There has been some recent research that suggests that although we have learning preferences, the idea of an exclusive learning style has been largely debunked. We should have varied teaching techniques of course, but we can quit the ridiculously impossible attempts to neurotically satisfy every need.
That said, there is a book which I highly recommend. It is "The Compelling Communicator" by Tim Pollard. He uses brain science to argue that any presentation, demonstration, example, etc., should be limited to three things. This is because the brain, for most of us, is only able to process three things at a time. Adding more than that shuts the brain down to the point that it may not remember the main point of the demo. So, keep it simple and assess it simply, but immediately.
Sal Kahn of Kahn academy argues that technical skills, such as Math should require 100% mastery before moving to more advanced matter. This underscores the need for frequent, even if unofficial assessment. The biggest reason students are 'left behind' is not because they can't, but because they didn't.
