Weak Points: None Platform: iPhone/iPad/Android Cost: Free Summary: Sometimes you just need to make a graph. If your TI-84 isn’t handy, Desmos Graphing Calculator is a good backup to have.

Desmos founder talks graphing calculators, charting his career Eli Luberoff ’09 discusses his educational journey and inspiration for Desmos with current Yale College students.

And if Desmos’ test app continues its smooth rollout, computer-based testing organizations like Smarter Balanced ought to pay heed, especially after their graphing tools have been described as “ ...