Here is a cute problem that requires visualizing two-dimensional shapes within a three-dimensional object, and using properties of triangles and the Pythagorean theorem to solve a real-world problem. There is a small mistake in this...

In this centimeter/millimeter worksheet, students estimate the length of pictures of tropical fish, then measure each to the nearest centimeter and use the measurements to solve 2 problems, then solve 2 additional problems.

Fifth graders imagine an aquarium filled with 1,000 fish on a math worksheet. They express each species as a fraction of the total number of fish in the tank. Students reduce each fraction to lowest terms and then express them as...