Most of us are well versed in the concept of prior learning. Yet, Babbage encourages us to think deeply and to find and acknowledge students' prior learning, which exists on most topics although it may?or may not?have come from a formal lesson in school.He gives creative examples that identify students' prior learning and how it relates to new content to be learned....Babbage...provides examples of lesson plans that pertain to such topics as fractions, paragraph writing, reading comprehension, supply anddemand, multiplication, architecture, government, mathematics word problems, graphs, energy, motion and focus, chronological order, comparing and contrasting, accepting responsibility, the scientific method and others. Babbage does explain the term extreme teaching and provides us with enough data and information to enable us to do it....teachers and administrators...will benefit from his work..