Learning Pyramid compares Passive to Participatory teaching methods in regards to average retention rates.
My concern is the research used to determine the percentages reported.
"Need a pentagonal pyramid that's six inches tall? Or a number line that goes from ‑18 to 32 by 5's? Or a set of pattern blocks where all shapes have one-inch sides? You can create all those things and more with the Dynamic Paper tool. Place the images you want, then export it as a PDF activity sheet for your students or as a JPEG image for use in other applications or on the web."
Advocates also say that the availability of technology that can call up the knowledge of the world's best thinkers with the click of a mouse, that can graph in two seconds what once took hours, and that can put scientific instrumentation in a pocket-sized computer further argues for moving away from century-old models of instruction.