Tyler's Rationale is a foundational framework for curriculum development proposed by Ralph Tyler in the 1940s, emphasizing a systematic approach to designing educational experiences. It outlines four fundamental questions that guide curriculum planning: what educational purposes should the school seek to attain, what experiences can be provided to help achieve these purposes, how can these experiences be organized effectively, and how can we determine whether these purposes are being achieved. This structured method highlights the importance of clear goals, relevant content, and assessment in creating effective educational programs.