3 lesson unit on interpreting graphs, in particular misleading graphs. https://docs.google.com/presentation/d/1n0vtAOIIcU_0d58hTNuDnXv1lS_j_K4_3EdwzsXY82M/edit?usp=sharing{...}

Introduce the problem to students: How many handshakes would there be if everyone in the classroom shook hands exactly once?{...}

Use the numbers 1, 2, 3 and 4 to create number sentences that equal each number from 1 to 20.{...}