Like GoMath but don't like their digital materials? I made my own to help my kids stay engaged. Each Notebook file page comes with a learning target that is easily changed to meet your exact wording.
My students never really took to the strategy in Lesson 1 so I took what I liked about it (multiply multiples of 10, etc) and added a couple of slides to this lesson. This lesson applies that skill by having students estimate the products of 2-digit numbers.
Check out my Chapter 1 Lesson1 freebie to see if my work will work for you!