H.S. CLASS is an acronym for High School Class, which typically refers to the courses offered in a high school curriculum. The crossword solutions for this term are GEOG (4 letters) for Geography, CHEM (4 letters) for Chemistry, GEOM (4 letters) for Geometry, ALG (3 letters) for Algebra, ENG (3 letters) for English, BIO (3 letters) for Biology, SCI (3 letters) for Science, BIOL (4 letters) for Biology Lab, ECON (4 letters) for Economics, TRIG (4 letters) for Trigonometry, and BIOLAB (6 letters) for Biology Laboratory.