From ec764ef7cbf03ef1e2f4e49d7ebc1b6a65234b9c Mon Sep 17 00:00:00 2001
From: Clarence Bakosi Due to unforeseen weather conditions, the hike has been cancelled. Due to unforeseen weather conditions, the hike has been canceled.
-We wish to colour the interior of each triangle with one of three colours: red, green or blue, so that no two neighboring triangles have the same colour. Such a colouring shall be called valid. Here, two triangles are said to be neighboring if they share an edge. Note: if they only share a vertex, then they are not neighbors.
+We wish to color the interior of each triangle with one of three colors: red, green or blue, so that no two neighboring triangles have the same color. Such a coloring shall be called valid. Here, two triangles are said to be neighboring if they share an edge. Note: if they only share a vertex, then they are not neighbors.
-For example, here is a valid colouring of the above grid:
+For example, here is a valid coloring of the above grid:
-A colouring C' which is obtained from a colouring C by rotation or reflection is considered distinct from C unless the two are identical.
+A coloring C' which is obtained from a coloring C by rotation or reflection is considered distinct from C unless the two are identical.
-How many distinct valid colourings are there for the above configuration?
+How many distinct valid colorings are there for the above configuration?
# --hints--
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md
index 684ac705b67..54fdef9ec8d 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md
@@ -1,6 +1,6 @@
---
id: 5900f42f1000cf542c50ff40
-title: 'Problem 194: Coloured Configurations'
+title: 'Problem 194: Colored Configurations'
challengeType: 1
forumTopicId: 301832
dashedName: problem-194-coloured-configurations
@@ -11,7 +11,7 @@ dashedName: problem-194-coloured-configurations
Consider graphs built with the units A:
and B:
, where the units are glued along the vertical edges as in the graph
.
-A configuration of type $(a,b,c)$ is a graph thus built of $a$ units A and $b$ units B, where the graph's vertices are coloured using up to $c$ colours, so that no two adjacent vertices have the same colour. The compound graph above is an example of a configuration of type $(2,2,6)$, in fact of type $(2,2,c)$ for all $c ≥ 4$
+A configuration of type $(a,b,c)$ is a graph thus built of $a$ units A and $b$ units B, where the graph's vertices are colored using up to $c$ colors, so that no two adjacent vertices have the same color. The compound graph above is an example of a configuration of type $(2,2,6)$, in fact of type $(2,2,c)$ for all $c ≥ 4$
Let $N(a,b,c)$ be the number of configurations of type $(a,b,c)$. For example, $N(1,0,3) = 24$, $N(0,2,4) = 92928$ and $N(2,2,3) = 20736$.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.md
index 608f288e3e9..5606ec27dac 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-101-to-200/problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence.md
@@ -1,6 +1,6 @@
---
id: 5900f4311000cf542c50ff44
-title: 'Problem 197: Investigating the behaviour of a recursively defined sequence'
+title: 'Problem 197: Investigating the behavior of a recursively defined sequence'
challengeType: 1
forumTopicId: 301835
dashedName: problem-197-investigating-the-behaviour-of-a-recursively-defined-sequence
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md
index 2d05c21e3cd..de0140e7cff 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md
@@ -14,7 +14,7 @@ The area under the blancmange curve is equal to $\frac{1}{2}$, shown in pink in
-Let $C$ be the circle with centre ($\frac{1}{4}$,$\frac{1}{2}$) and radius $\frac{1}{4}$, shown in black in the diagram.
+Let $C$ be the circle with center ($\frac{1}{4}$,$\frac{1}{2}$) and radius $\frac{1}{4}$, shown in black in the diagram.
What area under the blancmange curve is enclosed by $C$? Give your answer rounded to eight decimal places in the form 0.abcdefgh
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-243-resilience.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-243-resilience.md
index 67287eac731..2548f09b2c3 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-243-resilience.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-243-resilience.md
@@ -14,7 +14,7 @@ For any denominator, $d$, there will be $d−1$ proper fractions; for example, w
$$\frac{1}{12}, \frac{2}{12}, \frac{3}{12}, \frac{4}{12}, \frac{5}{12}, \frac{6}{12}, \frac{7}{12}, \frac{8}{12}, \frac{9}{12}, \frac{10}{12}, \frac{11}{12}$$
-We shall call a fraction that cannot be cancelled down a resilient fraction.
+We shall call a fraction that cannot be canceled down a resilient fraction.
Furthermore we shall define the resilience of a denominator, $R(d)$, to be the ratio of its proper fractions that are resilient; for example, $R(12) = \frac{4}{11}$.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-245-coresilience.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-245-coresilience.md
index c3e090d0edb..74ca408fc9d 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-245-coresilience.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-245-coresilience.md
@@ -8,7 +8,7 @@ dashedName: problem-245-coresilience
# --description--
-We shall call a fraction that cannot be cancelled down a resilient fraction.
+We shall call a fraction that cannot be canceled down a resilient fraction.
Furthermore we shall define the resilience of a denominator, $R(d)$, to be the ratio of its proper fractions that are resilient; for example, $R(12) = \frac{4}{11}$.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md
index 04cc4e5e8c4..77ff67dd38c 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md
@@ -10,7 +10,7 @@ dashedName: problem-246-tangents-to-an-ellipse
A definition for an ellipse is:
-Given a circle $c$ with centre $M$ and radius $r$ and a point $G$ such that $d(G, M) < r$, the locus of the points that are equidistant from $c$ and $G$ form an ellipse.
+Given a circle $c$ with center $M$ and radius $r$ and a point $G$ such that $d(G, M) < r$, the locus of the points that are equidistant from $c$ and $G$ form an ellipse.
The construction of the points of the ellipse is shown below.
@@ -18,7 +18,7 @@ The construction of the points of the ellipse is shown below.
Given are the points $M(-2000, 1500)$ and $G(8000, 1500)$.
-Given is also the circle $c$ with centre $M$ and radius $15\\,000$.
+Given is also the circle $c$ with center $M$ and radius $15\\,000$.
The locus of the points that are equidistant from $G$ and $c$ form an ellipse $e$.
@@ -26,7 +26,7 @@ From a point $P$ outside $e$ the two tangents $t_1$ and $t_2$ to the ellipse are
Let the points where $t_1$ and $t_2$ touch the ellipse be $R$ and $S$.
-
+
For how many lattice points $P$ is angle $RPS$ greater than 45°?
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-264-triangle-centres.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-264-triangle-centres.md
index ad3e968e5a0..44a0321af43 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-264-triangle-centres.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-264-triangle-centres.md
@@ -1,6 +1,6 @@
---
id: 5900f4751000cf542c50ff87
-title: 'Problem 264: Triangle Centres'
+title: 'Problem 264: Triangle Centers'
challengeType: 1
forumTopicId: 301913
dashedName: problem-264-triangle-centres
@@ -11,8 +11,8 @@ dashedName: problem-264-triangle-centres
Consider all the triangles having:
- All their vertices on lattice points.
-- Circumcentre at the origin O.
-- Orthocentre at the point H(5, 0).
+- Circumcenter at the origin O.
+- Orthocenter at the point H(5, 0).
There are nine such triangles having a $\text{perimeter} ≤ 50$.
@@ -45,10 +45,10 @@ Find all such triangles with a $\text{perimeter} ≤ {10}^5$. Enter as your answ
# --hints--
-`triangleCentres()` should return `2816417.1055`.
+`triangleCenters()` should return `2816417.1055`.
```js
-assert.strictEqual(triangleCentres(), 2816417.1055);
+assert.strictEqual(triangleCenters(), 2816417.1055);
```
# --seed--
@@ -56,12 +56,12 @@ assert.strictEqual(triangleCentres(), 2816417.1055);
## --seed-contents--
```js
-function triangleCentres() {
+function triangleCenters() {
return true;
}
-triangleCentres();
+triangleCenters();
```
# --solutions--
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md
index 602c9bba0cb..98de12df3a6 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md
@@ -11,9 +11,9 @@ dashedName: problem-275-balanced-sculptures
Let us define a balanced sculpture of order $n$ as follows:
- A polyomino made up of $n + 1$ tiles known as the blocks ($n$ tiles) and the plinth (remaining tile);
-- the plinth has its centre at position ($x = 0$, $y = 0$);
+- the plinth has its center at position ($x = 0$, $y = 0$);
- the blocks have $y$-coordinates greater than zero (so the plinth is the unique lowest tile);
-- the centre of mass of all the blocks, combined, has $x$-coordinate equal to zero.
+- the center of mass of all the blocks, combined, has $x$-coordinate equal to zero.
When counting the sculptures, any arrangements which are simply reflections about the $y$-axis, are not counted as distinct. For example, the 18 balanced sculptures of order 6 are shown below; note that each pair of mirror images (about the $y$-axis) is counted as one sculpture:
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md
index b81654d2712..7cd1e4dc0cc 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md
@@ -10,7 +10,7 @@ dashedName: problem-295-lenticular-holes
We call the convex area enclosed by two circles a lenticular hole if:
-- The centres of both circles are on lattice points.
+- The centers of both circles are on lattice points.
- The two circles intersect at two distinct lattice points.
- The interior of the convex area enclosed by both circles does not contain any lattice points.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md
index 4ea1175b497..a6c4057f0e9 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md
@@ -12,7 +12,7 @@ A spherical triangle is a figure formed on the surface of a sphere by three grea
-Let $C(r)$ be the sphere with the centre (0,0,0) and radius $r$.
+Let $C(r)$ be the sphere with the center (0,0,0) and radius $r$.
Let $Z(r)$ be the set of points on the surface of $C(r)$ with integer coordinates.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-349-langtons-ant.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-349-langtons-ant.md
index 71fe17860a2..f5a9ee5eb51 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-349-langtons-ant.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-349-langtons-ant.md
@@ -8,7 +8,7 @@ dashedName: problem-349-langtons-ant
# --description--
-An ant moves on a regular grid of squares that are coloured either black or white.
+An ant moves on a regular grid of squares that are colored either black or white.
The ant is always oriented in one of the cardinal directions (left, right, up or down) and moves from square to adjacent square according to the following rules:
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-353-risky-moon.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-353-risky-moon.md
index 83cb0d40c9e..5cfb3222e14 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-353-risky-moon.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-353-risky-moon.md
@@ -8,7 +8,7 @@ dashedName: problem-353-risky-moon
# --description--
-A moon could be described by the sphere $C(r)$ with centre (0, 0, 0) and radius $r$.
+A moon could be described by the sphere $C(r)$ with center (0, 0, 0) and radius $r$.
There are stations on the moon at the points on the surface of $C(r)$ with integer coordinates. The station at (0, 0, $r$) is called North Pole station, the station at (0, 0, $-r$) is called South Pole station.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md
index ba9f30d57a9..3f5aa58929b 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md
@@ -12,7 +12,7 @@ Consider a honey bee's honeycomb where each cell is a perfect regular hexagon wi
-One particular cell is occupied by the queen bee. For a positive real number $L$, let $B(L)$ count the cells with distance $L$ from the queen bee cell (all distances are measured from centre to centre); you may assume that the honeycomb is large enough to accommodate for any distance we wish to consider.
+One particular cell is occupied by the queen bee. For a positive real number $L$, let $B(L)$ count the cells with distance $L$ from the queen bee cell (all distances are measured from center to center); you may assume that the honeycomb is large enough to accommodate for any distance we wish to consider.
For example, $B(\sqrt{3}) = 6$, $B(\sqrt{21}) = 12$ and $B(111\\,111\\,111) = 54$.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-371-licence-plates.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-371-licence-plates.md
index dee9928047e..f68ffa301c2 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-371-licence-plates.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-371-licence-plates.md
@@ -1,6 +1,6 @@
---
id: 5900f4e01000cf542c50fff2
-title: 'Problem 371: Licence plates'
+title: 'Problem 371: License plates'
challengeType: 1
forumTopicId: 302033
dashedName: problem-371-licence-plates
@@ -8,17 +8,17 @@ dashedName: problem-371-licence-plates
# --description--
-Oregon licence plates consist of three letters followed by a three digit number (each digit can be from [0...9]).
+Oregon license plates consist of three letters followed by a three digit number (each digit can be from [0...9]).
While driving to work Seth plays the following game:
-Whenever the numbers of two licence plates seen on his trip add to 1000 that's a win.
+Whenever the numbers of two license plates seen on his trip add to 1000 that's a win.
E.g. `MIC-012` and `HAN-988` is a win and `RYU-500` and `SET-500` too (as long as he sees them in the same trip).
Find the expected number of plates he needs to see for a win. Give your answer rounded to 8 decimal places behind the decimal point.
-**Note:** We assume that each licence plate seen is equally likely to have any three digit number on it.
+**Note:** We assume that each license plate seen is equally likely to have any three digit number on it.
# --hints--
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md
index 1ce03a2ef3e..9828929ecbe 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md
@@ -14,7 +14,7 @@ The pie is circular. He starts with slicing an initial cut in the pie along a ra
While there is at least a given fraction $F$ of pie left, he performs the following procedure:
-- He makes two slices from the pie centre to any point of what is remaining of the pie border, any point on the remaining pie border equally likely. This will divide the remaining pie into three pieces.
+- He makes two slices from the pie center to any point of what is remaining of the pie border, any point on the remaining pie border equally likely. This will divide the remaining pie into three pieces.
- Going counterclockwise from the initial cut, he takes the first two pie pieces and eats them.
When less than a fraction $F$ of pie remains, he does not repeat this procedure. Instead, he eats all of the remaining pie.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md
index 1ffc88e95b2..6715601ef2b 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md
@@ -10,7 +10,7 @@ dashedName: problem-431-square-space-silo
Fred the farmer arranges to have a new storage silo installed on his farm and having an obsession for all things square he is absolutely devastated when he discovers that it is circular. Quentin, the representative from the company that installed the silo, explains that they only manufacture cylindrical silos, but he points out that it is resting on a square base. Fred is not amused and insists that it is removed from his property.
-Quick thinking Quentin explains that when granular materials are delivered from above a conical slope is formed and the natural angle made with the horizontal is called the angle of repose. For example if the angle of repose, $\alpha = 30°$, and grain is delivered at the centre of the silo then a perfect cone will form towards the top of the cylinder. In the case of this silo, which has a diameter of 6m, the amount of space wasted would be approximately 32.648388556 m3. However, if grain is delivered at a point on the top which has a horizontal distance of $x$ metres from the centre then a cone with a strangely curved and sloping base is formed. He shows Fred a picture.
+Quick thinking Quentin explains that when granular materials are delivered from above a conical slope is formed and the natural angle made with the horizontal is called the angle of repose. For example if the angle of repose, $\alpha = 30°$, and grain is delivered at the center of the silo then a perfect cone will form towards the top of the cylinder. In the case of this silo, which has a diameter of 6m, the amount of space wasted would be approximately 32.648388556 m3. However, if grain is delivered at a point on the top which has a horizontal distance of $x$ metres from the center then a cone with a strangely curved and sloping base is formed. He shows Fred a picture.
diff --git a/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-449-chocolate-covered-candy.md b/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-449-chocolate-covered-candy.md
index f312fd4ab49..ab096ad57ef 100644
--- a/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-449-chocolate-covered-candy.md
+++ b/curriculum/challenges/english/18-project-euler/project-euler-problems-401-to-480/problem-449-chocolate-covered-candy.md
@@ -8,9 +8,9 @@ dashedName: problem-449-chocolate-covered-candy
# --description--
-Phil the confectioner is making a new batch of chocolate covered candy. Each candy centre is shaped like an ellipsoid of revolution defined by the equation: $b^2x^2 + b^2y^2 + a^2z^2 = a^2b^2$.
+Phil the confectioner is making a new batch of chocolate covered candy. Each candy center is shaped like an ellipsoid of revolution defined by the equation: $b^2x^2 + b^2y^2 + a^2z^2 = a^2b^2$.
-Phil wants to know how much chocolate is needed to cover one candy centre with a uniform coat of chocolate one millimeter thick.
+Phil wants to know how much chocolate is needed to cover one candy center with a uniform coat of chocolate one millimeter thick.
If $a = 1$ mm and $b = 1$ mm, the amount of chocolate required is $\frac{28}{3} \pi$ mm3
diff --git a/curriculum/challenges/english/21-a2-english-for-developers/learn-how-to-clarify-information-in-different-interactions/663cdd506fb3896b73b1cd13.md b/curriculum/challenges/english/21-a2-english-for-developers/learn-how-to-clarify-information-in-different-interactions/663cdd506fb3896b73b1cd13.md
index ffc1976478f..a904d8b2754 100644
--- a/curriculum/challenges/english/21-a2-english-for-developers/learn-how-to-clarify-information-in-different-interactions/663cdd506fb3896b73b1cd13.md
+++ b/curriculum/challenges/english/21-a2-english-for-developers/learn-how-to-clarify-information-in-different-interactions/663cdd506fb3896b73b1cd13.md
@@ -19,7 +19,7 @@ How does Brian feel about Maria's comment?
## --answers--
-He agrees with her and thinks the project should be cancelled
+He agrees with her and thinks the project should be canceled
### --feedback--
diff --git a/curriculum/challenges/english/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md b/curriculum/challenges/english/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md
index 872cc725013..d5a91b986fc 100644
--- a/curriculum/challenges/english/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md
+++ b/curriculum/challenges/english/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md
@@ -36,7 +36,7 @@ The phrase implies multiple topics, not just one.
---
-The meeting will be cancelled today.
+The meeting will be canceled today.
### --feedback--
diff --git a/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-clarify-misunderstandings/67f23113167e8db615deaf61.md b/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-clarify-misunderstandings/67f23113167e8db615deaf61.md
index abfec89a538..a653c861a22 100644
--- a/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-clarify-misunderstandings/67f23113167e8db615deaf61.md
+++ b/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-clarify-misunderstandings/67f23113167e8db615deaf61.md
@@ -45,7 +45,7 @@ This two-word phrase refers to the planned time or timeline for releasing a prod
`Not necessarily` means something might not be true, even if it seems that way. For example:
-- Person 1: `Is it going to be cancelled?`
+- Person 1: `Is it going to be canceled?`
- Person 2: `Not necessarily.` - This means it's possible, but not certain.
diff --git a/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-manage-a-conversation/67f08338121a6bf9e146c09f.md b/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-manage-a-conversation/67f08338121a6bf9e146c09f.md
index 667b539b047..b235fe6965f 100644
--- a/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-manage-a-conversation/67f08338121a6bf9e146c09f.md
+++ b/curriculum/challenges/english/24-b1-english-for-developers/learn-how-to-manage-a-conversation/67f08338121a6bf9e146c09f.md
@@ -51,7 +51,7 @@ They are not moving as fast as planned.
---
-They were cancelled.
+They were canceled.
### --feedback--
diff --git a/curriculum/challenges/english/25-front-end-development/lecture-best-practices-for-accessibility-and-css/672aa82768e00d600305afc0.md b/curriculum/challenges/english/25-front-end-development/lecture-best-practices-for-accessibility-and-css/672aa82768e00d600305afc0.md
index 852817322a4..b8910c99e61 100644
--- a/curriculum/challenges/english/25-front-end-development/lecture-best-practices-for-accessibility-and-css/672aa82768e00d600305afc0.md
+++ b/curriculum/challenges/english/25-front-end-development/lecture-best-practices-for-accessibility-and-css/672aa82768e00d600305afc0.md
@@ -29,7 +29,7 @@ body {
In this example, we've set a white background (`#FFFFFF`) and dark gray text (`#333333`). You can input these color codes into the WebAIM tool to check their contrast ratio.
-Another valuable tool is the TPGi Colour Contrast Analyzer. This desktop application offers more advanced features compared to online tools. It allows you to analyze entire web pages, not just individual color pairs. You can use its color picker to select colors directly from your screen, making it easier to check contrast ratios for existing designs.
+Another valuable tool is the TPGi Colour Contrast Analyzer. This desktop application offers more advanced features compared to online tools. It allows you to analyze entire web pages, not just individual color pairs. You can use its color picker to select colors directly from your screen, making it easier to check contrast ratios for existing designs.
The TPGi Colour Contrast Analyzer also provides simulations for different types of color vision deficiencies, helping you ensure your design is accessible to users with various forms of color blindness.
@@ -79,7 +79,7 @@ Think about why contrast between text and background is important for users.
## --text--
-Which feature does the TPGi Color Contrast Analyzer offer that most online contrast checkers don't?
+Which feature does the TPGi Colour Contrast Analyzer offer that most online contrast checkers don't?
## --answers--
diff --git a/curriculum/challenges/english/25-front-end-development/lecture-importance-of-semantic-html/6729963b1ab11638753cf082.md b/curriculum/challenges/english/25-front-end-development/lecture-importance-of-semantic-html/6729963b1ab11638753cf082.md
index e4c3ff08414..eb09145196d 100644
--- a/curriculum/challenges/english/25-front-end-development/lecture-importance-of-semantic-html/6729963b1ab11638753cf082.md
+++ b/curriculum/challenges/english/25-front-end-development/lecture-importance-of-semantic-html/6729963b1ab11638753cf082.md
@@ -36,10 +36,10 @@ The strikethrough element, or `s` element for short, should be used to represent
```html
Tomorrow's hike will be meeting at noon.Tomorrow's hike will be meeting at noon.
- Due to unforeseen weather conditions, the hike has been cancelled. + Due to unforeseen weather conditions, the hike has been canceled.
```