Table of Contents

Unit 3: Reasoning and Explaining (MP2 and MP3)

3.5.2 Conclusions

At the conclusion of this unit, the following assumptions and claims can be made:


  • Classrooms of teachers and students need time, culture, and opportunities to implement the reasoning and explaining practices.
  • Classrooms need to establish a “community of reasoners” where students make public their thinking:
    • To use mathematical language to make claims and justify them
    • To be questioned by peers
    • To use shared mathematical knowledge
  • Revision is an essential part of increasing the viability of arguments


  • If all students become proficient with using the reasoning and explaining practices, they will improve their learning, understanding, and application of mathematics.

Students at all grades can listen or read the arguments of others, decide whether they make sense, and ask useful questions to clarify or improve the arguments."

California's CCSS for Mathematics, 2012


Time to Reflect

In your Metacognitive Journal [MJ3.5.2], reflect on what you learned in this unit to find evidence of the reasoning and explaining standards. Write about how you might create a community of reasoners and implement the learned practices into your classroom


Login required to enable "Save Answers" feature.