In this clip, Stephanie and Dana continue to work on the Towers Problem, introduced in the first clip in this series. Stephanie tells another group of children to double-check their towers for duplicates since they have found seventeen towers. Researcher Amy Martino asks Stephanie how she is sure that there are only sixteen towers and Stephanie decides to try to find one more tower, but is unsuccessful. Amy then asks Stephanie and Dana to record their tower combinations by coloring in towers on

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... a worksheet and to organize them in a way which shows how they know that they have found them all. Stephanie questions Amy about what she means by organizing the towers, reiterating that they checked their towers to be sure they have them all. Amy advises them to draw their towers in the same order as they created them. The girls record their towers.