Estes Educator "Guide for Teachers and Youth Group Leaders" by John Carroll, updated and edited by Ann Grimm. New $3.59 (28% off). Features: Illustrated paperback booklet comes 3-hole punched for convenient insertion into binders - Covers the basics of model rocketry equipment and explains how model rockets fly - Provides a thorough description of the Estes Educator educational program - Explains how to select a safe and successful model rocket launch site - Identifies laws pertaining to model rocketry and presents the NAR Model Rocketry Safety Code.