The study purposes were to describe throwing form and gender differences before and after instruction during a game. Children's (ages 6-8, n = 105) throwing form was assessed while they played a game (snowball) using the Body Component Assessment for Throwing in Games to determine the modal developmental levels for the step, trunk, and forearm components. Each student received four 30-min sessions of throwing instruction. There were significant (p less than 0.017) gender differences at each session and for each component. A Wilcoxon-Signed Ranks Test revealed differences (p less than 0.017) between pretest and after instruction for boys' trunk and forearm components and girls' step and trunk components. The improvement after instruction and gender differences were similar to those found in a controlled, practice context. (Contains 3 tables and 3 figures.)