If there are nine people in a room and every person shakes hands exactly once with each of the other people, how many handshakes will there be? How can you prove your answer is correct using a model ...

Solve word problems using a checklist. Engage in a Number Talk to find "how many." Solve addition and subtraction word problems with a Step-by-Step Visual Model checklist. Understand what the problem ...

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Of the many skills leaders need to be effective, research consistently shows that complex problem solving is paramount. For most of us, however, solving difficult problems and selling the solutions ...