fix(curriculum): clarify elif evaluation order (#65563)

curriculum/challenges/english/blocks/lecture-booleans-and-conditionals/67fe85a3db9bad35f2b6a2bd.md

@@ -111,10 +111,10 @@ There might be situations in which you want to account for multiple conditions.
 Here's the syntax:
 
 ```python
-if condition:
-   pass # Code to execute if condition is True
+if condition1:
+   pass # Code to execute if condition1 is True
 elif condition2:
-   pass # Code to execute if condition2 is True
+   pass # Code to execute if condition1 is False and condition2 is True
 else:
    pass # Code to execute if all conditions are False
 ```

curriculum/challenges/english/blocks/review-python-basics/67f39b40deaec81a3e40e0c5.md

@@ -711,7 +711,7 @@ if age >= 18:
     print('You are an adult') # You are an adult
 ```
 
-- **`elif` Statement**: These are conditions that come after an `if` statement. If the `elif` condition evaluates to `True`, then that block of code will run.
+- **`elif` Statement**: These are conditions that come after an `if` statement. An `elif` block runs only if all previous conditions evaluate to `False` and its own condition evaluates to `True`.
 
 ```py
 age = 16

curriculum/challenges/english/blocks/workshop-movie-ticket-booking-calculator/696cbb3985e23420cd45c58f.md

@@ -13,7 +13,7 @@ The `if...elif...else` statement is used to check multiple conditions in order.
 if condition1:
    # Code to execute if condition1 is True
 elif condition2:
-   # Code to execute if condition2 is True
+   # Code to execute if condition1 is False and condition2 is True
 else:
    # Code to execute if all conditions are False
 ```