Noah Reyes, 11th grader, watches as teacher Crystal Kirch solves a problem in a pre-calculus class at Segerstrom High School in Santa Ana, Calif., Wednesday, Jan. 16, 2013. A growing number of ... more 
Noah Reyes, 11th grader, watches as teacher Crystal Kirch solves a problem 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) less 
1 / 6
Associated Press | Photo By Jae C. Hong
Sun, Jan 27, 2013 6:40 PM EST