This study was to examine how well fourth- and fifth-grade students demonstrated motor skill competency assessed with selected PE Metrics assessment rubrics (2009). Fourth- and fifth-grade students (n = 1,346-1,926) were assessed on their performance of three manipulative skills using the PE Metrics Assessment Rubrics during the pre-intervention year, the post-intervention year 1, and the post-intervention year 3. Descriptive statistics, independent t-test, ANOVA, and follow-up comparisons were conducted for data analysis. The results indicated that the post-intervention year 2 cohort performed significantly more competent than the pre-intervention cohort and the post-intervention year 1 cohort on the three manipulative skill assessments. The post-intervention year 1 cohort significantly outperformed the pre-intervention cohort on the soccer dribbling, passing, and receiving and the striking skill assessments, but not on the throwing skill assessment. Although the boys in the three cohorts performed significantly better than the girls on all three skills, the girls showed substantial improvement on the overhand throwing and the soccer skills from baseline to the post-intervention year 1 and the post-intervention year 2. However, the girls, in particular, need to improve striking skill. The CTACH PE was conducive to improving fourth- and fifth-grade students’ motor skill competency in the three manipulative skills. This study suggest that PE Metrics assessment rubrics are feasible tools for PE teachers to assess levels of students’ demonstration of motor skill competency during a regular PE lesson.