Ratio Lab

A bold-shape classroom presentation at a mature middle-school projection scale — 26pt reading text, 36–44pt headings — on chalk cream with navy ink: quantities drawn as rows of painted counter cells and large two-color ratio numerals, one marker-yellow plate for the answer, solid navy act breaks with two discs, native charts and a ratio table beside prose, outlined task frames, an interactive counter mixer, and overhead photography of real counters, beads and tiles.