This manual describes motor development laboratory activities to help future physical education teachers observe, assess, measure, and test students' motor skills. A total of 20 laboratory activities are described under five sections geared toward: (1) physical growth and maturation; (2) assessing early motor development; (3) assessing basic motor skills; (4) assessing skills by quantity and task difficulty; and (5) assessing correlates of motor development. Most of the activities include information on objectives, activity format, relevant readings, procedures, activity forms, illustrations, and discussion questions. Head circumference percentiles and observations checklist are appended. (CB)