The article features Bedtime Math. You can follow or subscribe to the blog to get three problems a day, aimed at pre-K, K-2, 2nd grade and up. According to the Time article, the site will add a higher level of difficulty for "tweens, teens and even adults" in late February. That's any day now! Hooray!
The Time story says:
the strongest evidence that Bedtime Math can change children's skills comes from data collected from Snacktime Math, a program of Bedtime Math problems given to kids attending summer camp at a New Jersey Boys & girls Club: more than 70% of the largely low-income students improved their skills after a six-week session.The article also mentions Math for Love, "a Seattle outfit that advises teachers on how to use games to spice up math education." I haven't read through much, but Math for Love's blog looks very good—interesting, witty, and mathy.