I think flashcards are popular because they're a good way to prepare the night before the exam. Language learning schools are popular because they're in fun pl

I think flashcards are popular because they're a good way to prepare the night before the exam. Language learning schools are popular because they're in fun places with lots of other interesting young people. Watching a YouTube video kind of sucks the fun out of language learning worse than flashcards do. Not that language learning in and of itself is fun to begin with.