Curated OER
Mystery Jars: Make Your Own
There are many ways to implement this estimation and counting activity. Young mathematicians fill jars with objects to create "mystery jars." Add difficulty by using smaller objects. After counting, learners secretly record their exact...
Curated OER
Add and Subtract Equations
One of these addition number sentences is incorrect: which one is it? Beginning mathematicians examine two simple equations, circling the one that is correct. An explanation on the bottom walks them through the processing, including...