Teachers flip for 'flipped learning' class model - Article Photos 1/6

Mariah Arostigue, left, and Noah Reyes, 11th graders, chat as they work on their homework in a pre-calculus class at Segerstrom High School in Santa Ana, Calif., Wednesday, Jan. 16, 2013. A growing number of teachers are implementing what is known as "flipped learning," in which students learn lessons as homework, mostly through online videos produced by teachers, and use classroom time to practice what they learned. (AP Photo/Jae C. Hong)