Andi Nur Abady; Liliana Puspa Sari; Pedomanta Keliat. OPTIMIZATION OF THE LAY UP SHOOT LEARNING RESULTS IN BASKETBALL GAME THROUGH MODIFIED LEARNING USING PLASTIC BALLS IN XI CLASS STUDENTS PRIVATE VOCATIONAL SCHOOL OF PAB 6 MEDAN YEAR 2018 2019 AJARAN. JSBG 2020, 8, 82-87.