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Worksheet
Curated OER

Mystery Jars: Make Your Own

For Students K - 4th
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...
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Worksheet
Curated OER

Add and Subtract Equations

For Students K - 1st
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...