Reasoning About Division

Checkout how this 4th grade teacher uses the number routine “Number Strings” to engage students in meaningful mathematical discourse as they build their understanding of how to find whole number quotients using strategies based on place value, MAFS.4.NBT.2.6. Through her facilitation of this lesson, the students are able to build an understanding of how a dividend can be broken apart to find the quotient. In this short routine, she paves the road for future exploration of the application of the distributive property and the division strategy of partial quotients.

She strategically engages students in the Standards for Mathematical Practice as they build their understanding of the content standard. The video has some great examples of instructional strategies to promote “SMP 1: Make sense of problems and persevere in solving them”, and “SMP 3: Construct viable arguments and critique the reasoning of others”.