I was paging through stuff in the file cabinet, when I ran across what might be the first scoresheet I ever kept using my current all-in-one format. I wasn't tracking shot attempts yet, but I was tracking non-scoring statistics like rebounds and turnovers across the bottom half of each player's line.
This is from Maine West vs. Gordon Tech, March 10, 1993, playing a sectional semifinal (at Fenton HS.) Maine West won, 71-61, to meet us (Glenbrook North) in the finals that Friday night. We won that game, heading to the supersectional at Northwestern for the second year in a row, where we beat Libertyville to earn our first trip downstate.