How was the slice made? If the cube’s side is half an inch, what is the side of the hexagon? After dropping the cube into his coffee, the engineer turned his attention to a doughnut lying flat on a ...

The puzzle’s box features a lovely pastoral image with a wooden church and other buildings in the midst of green fields, wildflowers of all colors in the foreground and, in the background, a mountain ...

Notice and Wonder When students become active doers of mathematics, the greatest gains of their mathematical thinking can be realized. NCTM members can engage with PreK-12 resources to support the ...