The document discusses the concept of backward design in planning instruction, which involves starting from desired learning outcomes and assessing if goals are met, as described by Ralph Tyler in 1949 and further popularized by Wiggins and McTighe. Backward design results in more clearly defined goals, appropriate assessments, aligned lessons, and purposeful teaching compared to traditional planning. The backward design process explained by Wiggins and McTighe begins with identifying the desired results and understanding before determining acceptable evidence and planning learning experiences.