This set of 13 activities, adapted from "Mathmatters: Developing Computational Skills with Developmental Activity Sequences (by Randall Souviney, Tamara Keyser, and Alan Sarver) was designed to help teachers using the Indigenous Mathematics Project materials (in Papua New Guinea) understand the basic processes involved in computation with whole numbers and provide background in the use of appropriate concrete models. The activities focus on base ten materials, place value, addition, subtraction, multiplication, and division. Recording sheets for pupil work are included. (MNS)