Robinson attended Laurel Highlands High School, where he was one of the most sought after schoolboy stars on the nation. He made most of the high school All-America teams and led Laurel Highlands to the state championship.

As a freshman, Robinson led the WVU frosh team in three departments: scoring (21.6 average), free-throw percentage (821.1) and assists (42). As a sophomore Robinson led the Mountaineers in almost every category: minutes played (929), field goals made and attempted (216-495), free throws attempted (88 of 114), total points (520) and scoring average (20.0). He was the only sophomore other than Rod Hundley to average 20 points in West Virginia's glorious history. He also made the All-Tournament team in the Sugar Bowl Classic (53 points in two games) and was honored by the Pittsburgh Writers Association as one of the Top Five in the Tri-State. Mountaineer coach Sonny Moran said that Robinson was the complete offensive basketball player. "He was an excellent shooter with great range," Moran stated. He was also described as having great spring in his legs, good timing around the boards, excellent hands, fine agility and great shooting touch, with very quick speed and driving ability. Robinson's 3.21 scholastic average earned him Academic All-America second team recognition that year.

Returning for his junior year, only one could have described All-American candidate Wil Robinson: Great—with a capital G. That season he was named by Basketball Extra magazine as one of the top 50 players in the nation. Like his sophomore year, he led the Mountaineers in field goals made and attempted (120-148), free throw percentage (81.1) and total points (624) as well as scoring average (25.0). His 872 minutes played left Robinson only second to Sam Oglesby's 827. Entering his senior year, he had left many speechless. He had been praised by the of every team the Mountaineers have played for two years. During that two year span, Robinson had averaged more than 22 points per contest.