What is the average number of words you can learn a day?

This is the title of an interesting thread at our LingQ Forum. I also did a video on this subject that keeps on coming up.

There are many different points of view. I thought this comment from an English teacher was quite interesting.

“During my CELTA certification I was taught to plan for 7+/-2 new words in any 90 minute lesson – call it 5 words per hour. The focus was not on building a large passive vocabulary but in being able to produce this new language quickly. If the latter is your own goal for a foreign language then I’d argue that this is a reasonable benchmark.

Do you want to be able to USE a vocabulary of 5000 words or word families? Expect 1000 hours of study.”

In other words, the position of this commenter is that you can only learn what the teacher doles out to you in the classroom. Needless to say I disagree. You have to reach out and find what interests you and learn the words that interest you.