Lesson 3

Learning Intention:
We are learning to calculate percentage discounts of 10%, 25%, and 50% using their decimal equivalents and apply this to real-life scenarios like online toy sales.

Success Criteria:

• I can convert 10%, 25%, and 50% to decimals.
  
  

• I can calculate the discount amount on items using these percentages.
  
  

• I can determine the final price after discount and explain the process using both mental calculations and digital tools.
  
  

Activity

Students explore a mock online toy catalogue with items priced between $20 and $80. For each:

1. Convert 10%, 25% and 50% to 0.10, 0.25 and 0.50
   
   

2. Calculate discount = price × decimal equivalent, first by hand then verify with a calculator Twinkl.
   
   

3. Determine sale price and present their findings in table form.
   
   

Extension

Give students “mystery” price tags (e.g. $47, $63) and ask them to calculate 25% off mentally using rounding strategies, then check with digital tools.

Intervention

For students needing support, provide step-by-step scaffolds:

• Highlight the conversion step (“10% becomes 0.10”)
  
  

• Use visual percent bars to illustrate 25% and 50% sections of $40 or $60