My first week “back-to-school” was a success. Monday to Friday, I opened up KhanAcademy at 9am and spent an hour watching videos and working through problems. I’m currently going through the Pre-algebra course, working through the Ratios, Rates, Proportions section. The week started with the question, “What is a Constant of Proportionality?” The short answer… Read More Back to School: Starting with Ratios and Proportions (Week 1)