Student interest in taking an online class is on the rise, the survey found. Among high school students, interest in taking an online class rose 21 percentage points from 2007 to 2008, with a 46 percentage-point increase seen among middle school students. According to one-third of the sixth- through 12th-grade students surveyed, online classes make it easier for students to succeed, because they are more comfortable asking questions and can review class materials as many times as they want or need.