“Back in the day” Schools were “broken up” into and A and B half the school year with the B level being first. It all depended on when a child would start school (September or January).
6A and 7B Grade Cards front and back
8th Grade Card Front and Back
9th Grade Card Front and Back
10 B Grade Card Front and Back
10 A Grade Card Front and Back
11 B Grade Card Front and Back
11 A Grade Card Front and Back
12 B Grade Card Front and Back
A Graph of Tariff Levels by Presidents dated 1944