How a problem get students engaged

The following video shows how a group of fifth graders work on a realistic problem related to time differences. The problem is adopted from PISA 2006 questions.

What is interesting?
If you listen critically to the conversations, you will find how this problem could engage students in thinking. Solving this problem, the students seems to first imagine themselves involved in the problem. They unintentionally positioned themselves to think of consequences, related to the situation, given in the problem.

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