1. An educational method using an interactive audio-visual system having at least one workstation comprising the steps of: presenting, at said workstation, a first lesson for teaching a first group of concepts, said first lesson using at least a first one of a plurality of styles and stimuli; providing, after said first presenting step, a plurality of questions based on said first lesson; comparing answers to said questions to correct answers; and presenting, based on said comparing step, a second lesson for teaching said first group of concepts, said second lesson using at least a second one of said plurality of styles and stimuli different from said at least first one of a plurality of styles and stimuli.