The first lady said the plan also includes increasing the number of high school students who take part in physical education classes.

VOA: special.2010.06.07

which is basically an extensive number of classes that everybody has to take if you're in Columbia College,

基本包含了大量的课，而且每个哥伦比亚的学生都要上，

哥伦比亚大学的教程 - SpeakingMax英语口语达人