California’s hottest new math teacher is an animated penguin named JiJi. Yes, it’s true. A mute, waddling, tuxedo-clad cartoon figure has been quietly taking over math programs dotting Silicon Valley, ...

On most days you can see Jiji the penguin waddling or unicycluing around 35 schools in Colorado Springs School District 11. The bird should preen its feathers this week because its work with students ...