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,...

Out into classrooms again today! This time I landed in the 2nd grade classroom of Doug Bremmer. Incredible teacher! I really loved how he did Number of the Day. The number of the day was 104. There was a small group of kids sitting on the floor in front of the...

I watched a student struggle with a number line problem earlier this week. The question said something like What number is represented by the letter A and most of the numbers on the number line were missing. Interesting thing was, she drew nice little hops, like the...