A 60-minute lesson designed to reinforce that students can choose to use different addition strategies in different situations.
This Mathematics unit covers a range of mental computation strategies for addition.
A 30-minute assessment designed to assess students' understanding of working with place value to solve problems, the connection between addition and subtraction, and the development of efficient mental strategies for computation.
A 60-minute lesson designed to build upon students' understanding of addition and subtraction by exploring compensation.
A 60-minute lesson designed to investigate the relationship between addition and subtraction.
A 60-minute lesson designed to progress students' understanding of mental addition by partitioning numbers into place value to help them find a total.