Lesson 1: Introduction to equal groups
This lesson introduces the concept of groups and explores the connection to multiplication and addition number sentences through imagery. Students will find groups and connect them to number sentences using ‘I Spy’ pictures.
Lesson 14: Subtraction Assessment
This is a summative assessment that covers the key objectives from this subtraction unit.
Lesson 13: Apply subtraction strategies to problem-solve
Students will consolidate and apply a range of subtraction strategies to problem-solve, such as counting on, bridging down to ten, jump strategy, split strategy and column subtraction. They will utilise these strategies in a critical-thinking activity that involves finding the ages of members of an animal family.
Lesson 12: Using flexible thinking to subtract efficiently
Students will use flexible thinking to manipulate numbers and subtract larger numbers effectively. They will use their knowledge and skills to help animals choose books to purchase.
Lesson 11: Solving word problems
Students will use their addition and subtraction skills and REPS strategy to solve word problems.
Lesson 10: Applying column method to subtract 3-digit numbers
Students will apply column method to subtract up to 3-digit numbers. They will utilise their skills to play a subtraction Bingo game.
Lesson 9: Using column method to subtract 3-digit numbers
Students will explore how to use column method to subtract. They will gain a conceptual understanding on how to regroup from larger place values through concrete and pictorial examples. They will use their knowledge to find the amount of treasure each pirate ship has lost.
Lesson 8: Applying split/jump strategy to calculate change
Students will apply jump strategy and split strategy to help customers calculate change at a yard sale.
Lesson 7: Using jump and split strategy to subtract 2-digit numbers
Students will be asked to investigate how they could use their knowledge of jump and split strategy and apply it to subtraction. They will then have the opportunity to refine and apply this strategy with a problem-solving activity that involves finding the missing amounts from each animal’s story.
Lesson 6: Exploring related facts
Students will delve into the relationship between addition and subtraction through inverse operations and related facts, highlighting how addition can be effectively used to solve subtraction problems. They will build fact family houses using picture prompts.