Challenged to recreate the “liberty matrix” they learned earlier this year, Cornerstone Schools students Desharanique Mitchell, left, and Monica Hamilton go over their notes.

Terrance Morris raises a hand to join the discussion of minimum wage laws and their effects. He and classmate Diara Alexander, right, are eighth-graders at Cornerstone Schools.

Guest teacher Brennan Brown uses an interactive whiteboard to describe the effects of the Fair Labor Standards Act in the Northern and Southern states.