Udemy differs from some of the other sites in that not all of the classes are free and some of the classes are taught not by professors but by people who have excelled in their particular fields, such as Mark Zuckerberg or Marissa Mayer.
Udemy dị iche site na saịtị ndị ọzọ na ndepụta a na ụzọ abụọ: nke mbụ, ọ bụghị ndị klas niile nwere onwe, na nke abụọ, ọ bụghị naanị ndị ọkachamara na-akụzi klas, kamakwa ndị mmadụ na-arụ ọrụ n'ubi ha, dika Mark Zuckerberg (onye nchoputa Facebook) ma obu Marissa Mayer (CEO nke Yahoo).