One way to be sure that your students can quickly recognize correct expressions for numbers is to have them sort out expressions that are not correct. That's what they'll do when they use "Let's Examine the Facts!" In addition to solve-and-sort cards, this set includes a student recording page.
As you see, this freebie includes activities for both 1-2 and 2-3, so it's perfect for use by math specialists, interventionists, multi-grade classrooms - or great teachers who know the importance of differentiating! Click on over to my blog to download your copy!