Calculus: A word that triggers involuntary fear spasms in the best of us. But the days of slogging through tedious textbook derivatives are over, if you want them to be. For the past few years, people across the world have studied calculus for free โฆ

Teaching Systems of Equations with Discovery Labs. This approach gets students to do the thinking and learn about systems of equations through a guided inquiry lesson. Students made such insightful connections throughout this lesson!