When a student complained that science textbooks were boring, teacher Tyler DeWitt started thinking about how to make his lessons more fun. DeWitt describes his quest to make kids care about science.

 Andreas Schleicher created PISA, an exam that compares the knowledge of 15-year-olds from around the world. He says the test can help us understand why some countries perform better than others.

 Sal Khan turned tutoring lessons with his cousins into a series of free educational videos called Khan Academy. His goal: to make learning accessible for everyone, everywhere.

 As principal of a low-performing school, Linda Cliatt-Wayman's students faced huge challenges. She shares how she transformed her school while providing unwavering love and support for her students.