Complex sentence: Carter was educated at Highland Elementary School (class of 1966) and at Abington Senior High School (class of 1972) in Abington, where he was President of the Honor Society, and a wrestler, lacrosse player, and cross-country runner.
Split into simpler sentences: Carter was educated at Highland Elementary School (class of 1966) and at Abington Senior High School (class of 1972) in Abington. In high school he was President of the Honor Society, and a wrestler, lacrosse player, and cross-country runner.