Teacher Appreciation Week: Third-grade teacher reads to new class while skydiving This article originally appeared on USA TODAY: MIT linear algebra professor Gil Strang's last lecture gets ovation ...

Professors and students alike praised math professor Gilbert Strang for his contributions last week. One social media user said his book "Introduction to Applied Mathematics" is a masterpiece.

Gilbert Strang’s linear algebra lectures, from M.I.T., are among the most watched courses on the Web.