These materials were developed, in part, by a grant from the federally-fundedMathematics and Science Partnership through the Center for STEM Education.Some of the activities were adapted from the National Council of Teachers ofMathematics Illuminations, the National Library of Virtual Manipulatives,Hands-On Math Projects with Real Applications by Judith A. Muschla and GaryR. Muschla, Learning Math with Calculators: Activities for Grades 3-8 by LenSparrow and Paul Swan, and Mathematical Ideas by Charles D. Miller, Vern E.Heeren and John Hornsby.