PROOFS #2: Exponents, Roots, Pythagoras, Theorems, Proofs, and The Kaplans [juicebox gallery_id=”25″] (April 23, 2013) Before continuing our TV problem, the students recapped last session for A, who had been absent last week. This week’s problem solving once again presented rich opportunities for delving deeply into arithmetic; it has not been the algebra and geometry that is challenging for these…