english: Now, the class ran 10 weeks, and in the end, about half of the 160,000 students watched at least one video each week, and over 20,000 finished all the homework, putting in 50 to 100 hours.
non_english: Kurz trval 10 týždňov a na jeho konci asi polovica zo 160 000 študentov videla aspoň jedno video týždenne a viac ako 20 000 dokončilo všetky úlohy, čo im trvalo 50 až 100 hodín.