When I was teaching ESL, my dear students sometimes asked how many words they should know. I told them that the average native speaker (of English) would use between 3000 and 5000 words on an everyday basis, and a vocabulary of 10,000 words would make you a well-read and well-spoken person. But, I warned them, it's no good memorizing a lot of words if you don't know what they mean.
This principle is obviously not taught in North American j-schools, for the lamestream media is full of spelling, grammatical and vocabulary errors, which we delight in pointing out from time to time. Here's one from today's online edition of the Financial Post, a part of Canada's so-called National Post.
If you didn't spot the error, it's back to Remedial English for you! And take Joe Chidley with you! At least it wasn't the "its/it's" mistake, or (my current pet peeve) "incidences" for "incidents".