A 3rd-grade math worksheet for investigating unknown angle measures using the additive property. Features visual blueprint-themed problems and "show your work" areas.

A set of 12 task cards for 3rd-grade math centers focused on determining area. Includes tasks for tiling with unit squares, calculating area of composed figures, and writing multiplication/repeated addition equations.

A visual slide deck introducing 3rd-grade area and angle measurement concepts through a 'Blueprint Builders' construction theme. Includes tiling methods, area equations, composed figures, and the additive property of angles.