It is noted that calculator usage is increasing and that little information was found on the effect of calculators on learning mathematics in elementary school. The activities described and included are intended to be examples of ways in which calculators may be used with existing curriculum materials. It is assumed that each teacher would select, modify, and develop activities with the best interest of children and the goals of the existing instructional program in mind. The document has been prepared to: (1) stimulate the use of calculators in the elementary grades; (2) provide teachers with "starter" ideas, and (3) provide suggestions for dealing with concepts that arise in the course of instruction with calculators. Samples of survey instruments designed to assess student opinions are provided. All examples of worksheets and student activities are noted according to the skill or area they are designed to promote. Brief guidelines for using calculators and notes on classroom management and calculator use are also included. (MP)