Found this in my basement...my Uncle Charlie's report card. Note the subjects as well as the monthly reporting to parents, though looks like reporting was actually performed every two months.

Subjects:
Deportment
Spelling
Reading
Writing
Arithmetic
Algebra
Geometry
US History
Mod (?) History
Civics
Geography
Agriculture
Nature Study
Language
Grammar
Rhetoric
Literature
Latin
Physiology
Biology
Physics
Drawing