Mathematical Thinking can be seen as a task, enrichment, or a starter in the classroom. Regardless, it is a problem that makes students think while supporting the CCSS standard listed utilizing the Mathematical Practices.
This Mathematical Thinker poses the problem of what happened 1,000,000 days ago? This is part 1 of a series of 1,000,000.
This thinker is designed to go with EnVision Topic 3 lesson 6 but will work with any lesson instructing towards 5.NBT.5.