Many mental math strategies rely on students being able to “jump” tens. For example, 10 more than 28 is 38. The fancy math term for this skill is counting by 10s off the decade. In other words, not just counting 10, 20, 30, 40, etc., but also counting 17,...

Many teachers still approach problem-solving as if it is a standalone topic to be taught in isolation. There are classrooms with Problem Solving Friday, for example. Doesn’t that send the message that we don’t do problem-solving on Monday through Thursday?...

A 120 chart is a great tool for supporting addition and subtraction with our younger kiddos, especially as they start to work with larger numbers. I would suggest having kids add and subtract using a 120 chart before teaching them any kind of formal computation....

Knowing the combinations for making 10 is an important early childhood math skill. Ideally, we want our students to leave Kindergarten with automaticity for the combinations of the numbers to ten. With Halloween just around the corner, your students can use this...