Plickers

Magical sheets of paper that work like classroom clickers

Campus Books

All your university textbooks in one place

Let the world tell your story

Grasshopper enables entrepreneurs to build a virtual office that connects callers to employees, wherever they are.

An open source tool for context-aware digital textbooks

Data driven approach to university selection

interactive model that lets kids study and observe the geol…

A live, one-hour class by Sam Altman on Platzi