3.MD.5. Recognize area as an attribute of plane figures and understand concepts of area measurement.
View full screen in your browser. This ITP allows you to colour in cells on a grid, a full cell or half a cell, or to place a circular counter into a cell. There are three choices of grid size: 5 by 5, 10 by 10 or 20 by 20. The grid can be hidden or replaced by a pin board around the points of which rubber bands can be stretched.
This resource is freely available to download from the archived Primary Framework site.