Many surveys have shown that adult learners that have daily access to computers enjoy and find more effective E-learning segments delivered in small increments. Our own informal polls indicate that under 15 minutes is an ideal delivery portion. A combination of bite sized chunks of knowledge that fit neatly into small segments of the learner's day seems best from both a learning retention point of view and a learner's positive attitude to the process. We work very hard with subject matter experts to compress delivered segments into usable smaller segments. Regulators in professions that require continuous education for their members (this includes medical professions, real estate professionals and many others) seem to work against this principle though. Their measure of "credits" is based on how long a delivered lesson is -- tending to push developers to make segments longer rather than shorter. Similar content delivered in longer times becomes the driving force. So much so that some... - Brian Sullivan