As some of you know, I have bilateral elbow tendinitis. As a result, I need to reduce the amount of time spent sitting in front of a keyboard. Unfortunately, this has forced me to slow down on the “Math From Scratch” series. From this point on, new lessons will appear on the first of each month, with lesson 15 due November 1. July and August, the “Summer school” month, will be skipped. Thus, there will now be ten lessons per year. Check the Bureau 42 calendar for updates.