SAPA (Science - A Process Approach) was developed in 1963 to teach students science process skills that are essential for understanding science information. SAPA breaks skills down into smaller steps that build upon each other from basic to more advanced skills. It emphasizes developing skills like observing, classifying, measuring in primary grades and controlling variables, formulating hypotheses in intermediate grades. Studies found students learning through SAPA outperformed those in traditional programs on achievement measures. SAPA aimed to equip students with thinking skills to solve future problems.