The purpose of this lesson is to introduce the unit of whole numbers and to activate prior knowledge.

Included is a YouTube video to support Grade 4 Blended Learning Math - Unit 2.0: Whole Numbers - Introduction.

The purpose of this lesson is to explore estimating sums.

Included is a YouTube video to support Grade 5 Blended Learning Math - Unit 2.4: Whole Numbers - Estimating Sums.

The purpose of this lesson is to explore strategies for estimating differences.

Included is a YouTube video to support Grade 5 Blended Learning Math - Unit 2.6: Whole Numbers - Estimating Differences.

The purpose of this lesson is to review estimation strategies and use them to help check answers - (front-end rounding, using benchmarks to help with rounding, compensation, compatible numbers)

Included is a YouTube video to support Grade 5 Blended Learning Math - Unit 2.7: Whole Numbers - Estimating to Check Answers.

Over 270 free printable math posters or maths charts suitable for interactive whiteboards, classroom displays, math walls, display boards, student handouts, homework help, concept introduction and consolidation and other math reference needs.