Briarlake Elementary School parent John Gerstle and Briarlake PTA president Robyn Binger fill up a wheelbarrow with mulch, while first-grader Aaron Gerstle, 6, helps. About 50 children and parents spent Monday morning fixing up the north DeKalb County elementary school grounds. Binger said the PTA has sponsored cleanup days in the past, but Monday's MLK day of service was the largest so far.