• Students will add two digit numbers with regrouping.

Activity

• Provide pairs of students with sets of snap cubes of between 12 and 27.

• Have students snap their cubes into sets of 10 and some leftover.

• Ask students to combine their sets. Do you have enough single cubes to make another "train" of 10 cubes?

• Have students write down the equation that tells about their collections.

• By having students trade partners, but keeping the same set of cubes, students will practice with several different combinations.

Assessment Tips from Old Tom the Turtle

• Observe children as they work:

• Are they looking to see if they can make another 10?

• Can they create the appropriate equation for their sets?