Multimediality
Keep in mind that students depend on a variety of interrelated factors when learning and internalizing skills and repertoire; the kinesthetic (picking and strumming) reinforces the aural (singing) which, in turn, reinforces the visual (sight-reading) and the intellectual (theory and analysis). To varying degrees, all of these factors can be included in every lesson.
1)
Ukukele in the Classroom. Teacher Edition, t. 1. Chrystal Lake Media 2009, xiii