Teen — Ages 10–14

Where STEM stops being a theme and starts being a subject. Teen-tier books cover the material that actually shows up in middle school and early high school — algebra, chemistry, physics, coding logic — with the worked examples and practice sets a student needs to get fluent, not just familiar.

Answer keys included. Written to be worked through with a pencil, alone, at a kitchen table.

An instant PDF download, yours the moment you check out. Print it at home as often as you like.