When I started teaching 6th-grade math at the beginning of the school year, I never would have imagined that my students would still be struggling to understand basic place value concepts. During the course of one of our math chapters (we use piloting the Engage NY curriculum here in our county to see if it is something we should adopt), students were asked to apply their understanding of place value when dividing. I quickly found out that many … [Read more...] about The Amazing Abacus: Understanding Place Value