So, in the question it was asked "principle or concepts", in your second lesson you want to teach an upward block, with all that fancy stuff attached.
Why not give them the idea/concept of forward and reverse as it applies to motion and let that be a tool with which they may grow themselves after they have left your tutelage?
Remember this is all in fun for the sake of understanding???
great stuff so far.
Good Journey,
Todd Durgan
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