The purpose of this study is to determine if children more severely involved with cerebral palsy respond as well to rectus transfer and hamstring surgery as those with less severe involvement. Ninety-nine children were classified as independent community ambulators, crutch/walker-dependent community ambulators, or household/exercise ambulators. Maximum knee extension in stance and total range of knee motion in gait increased following surgery in all groups. Peak knee flexion in swing was maintained in the independent group only, but timing of knee flexion in swing improved in all groups. All groups showed increases in stride length, and the household/exercise group also showed an increase in walking speed. Four of 39 crutch/walker-dependent community ambulators and 13 of 21 household/exercise ambulators progressed to the next higher functional ambulation group.