<qa>  What is the Canadian Occupational Performance Measure?This is a single blinded, randomized, controlled pre-testpost-test study design Figure 4. The twenty children with spastic diplegia or hemiplegia CP will be randomized by a statistician to one of two treatment groups. One group will undergo a 12-week at-home gait training program with ES, subjectsguardians can choose either the surface or percutaneous stimulation subgroup, and the second group will undergo a 12-week at-home gait training program without ES. For both groups, data will be collected at five points: just before gait training, after 4 and 8 weeks of gait training, at the conclusion of gait training after 12 weeks, and 4 weeks after gait training has been discontinued 16 weeks post initiation of gait training. Data collection at each follow-up point will include the kinetics and kinematics of walking, standing posture, gait initiation, plantar pressures, the administration of the Timed Up Go and Functional Reach Test, and the assessment of lower extremity muscle strength using a hand-held dynamometer. The Canadian Occupational Performance Measure COPM will be applied before and after the 12-week gait training program and 4 weeks after the gait training has been discontinued. For the 20 children with typical development, the same data will be collected except for the COPM and used for comparison to the pre-training data collected from all 20 children with CP. 