There are 3 sets of 16 word problems and a data chart used to answer these problems.
The green set is 2-digit problems that do not require regrouping.
The blue set has similar worded problems but they do require regrouping.
This allows for differentiation and students will not even notice.
In addition, there is a black and white set that has similar word problems with 3-digit problems that do require regrouping for enrichment.
I use Kagan strategies in my classroom. These problems can be used with a variety of Kagan team strategies (I use Fan-and-Pick) or they can be used for partners or as a center.