Percentages Power Up Real Life
A Year 7-8 Maths Journey Discovering percentages in everyday situations
Where Do We See Percentages?
Think about your daily life... Shopping and sales Sports statistics GST and taxes Interest rates Weather forecasts
Group Challenge: Shopping Sale Investigation
Work in groups of 4-5 students Your task: Calculate final prices after discounts Use the case study poster provided Show your working using TWO different methods Present your findings to the class
Case Study: Kiwi Sports Store Sale
25% off all rugby jerseys Original price: $120 Method 1: Calculate discount, then subtract Method 2: Use decimal multiplier Which method do you prefer and why?
Two Methods for Calculating Discounts
{"left":"Method 1: Subtract the Discount\nCalculate the discount amount\n25% of $120 = 0.25 × $120 = $30\nSubtract from original price\n$120 - $30 = $90","right":"Method 2: Decimal Multiplier\nConvert remaining percentage to decimal\n100% - 25% = 75% = 0.75\nMultiply original price by decimal\n0.75 × $120 = $90"}
Think-Pair-Share: Why Do Percentages Matter?
THINK: 2 minutes individual reflection Why is understanding percentages important in everyday life? PAIR: 3 minutes discussion with partner Share your ideas and listen to theirs SHARE: Present key insights to the class
Teacher Modelling: Mastering Percentage Calculations
Let's work through examples together Using bar models to visualize percentages Checking our answers make sense Estimation: Is our answer reasonable? Common mistakes to avoid
Percentage Calculation Strategies
Independent Practice: Real NZ Shopping Scenarios
Choose items from the catalogues provided Calculate sale prices with given discounts Show your working clearly Estimate first, then calculate Check: Does your answer make sense? Extension: Find the original price if given the sale price
Percentages Power Up Your Future!
Today we learned to calculate discounts and sale prices We discovered why percentage literacy matters We practiced with real New Zealand shopping scenarios Next lesson: Percentage increases and GST Keep looking for percentages in your daily life!