Learn to officiate basketball by mastering the NFHS high-school rulebook and how it applies to live plays — the foundation of the state high-school officiating exams. Master the definitions the whole game turns on (player versus team control, the dribble and traveling, a legal screen, legal guarding position and verticality, the act of shooting), the violations (traveling, double dribble, three-seconds, the five-second closely-guarded and ten-second backcourt counts, goaltending versus basket interference), and the fouls (personal, shooting, technical, intentional, and flagrant — plus block versus charge and the post-2023 team-foul bonus that awards two free throws on the fifth team foul each quarter). Then apply them through the case-book rulings that decide real plays: penalty enforcement on double and multiple fouls, throw-in provisions, correctable errors, and last-second timing. Each question teaches the rule, names the classic confusion (block versus charge, goaltending versus basket interference, player-control versus common foul), and ends with a portable cue. Authored from the public NFHS rules book, case book, and points of emphasis using original questions — never real exam items — and stamped to the NFHS high-school code, which changes yearly (NCAA, FIBA, and NBA rules differ). Keentune is independent study practice, not affiliated with or endorsed by NFHS, NCAA, FIBA, or IAABO, and does not guarantee a pass or certification. Educational only — how the rules work, not officiating advice for a specific game.