Our teacher had all of her students, including me, take a grammar course online. http://www.newsu.org/courses/cleaning-your-copy-grammar-style-and-more
One of the first things you do is take a pre-quiz. I got a 100% on grammar and spelling and did not do so well on style and punctuation. So, from there you go to the different tabs in the lesson and you learn about different things. In each tab there are multiple examples.
For example on the tab with numbers it had addresses, birthdays, and phone numbers.
At the end of each section in each tab there was a sample problem, and at the very end there was a test. I got an 8 out of 14.
There isn’t really anything more I would want to learn off of the course it was pretty all-inclusive. I would definitely say it was educational though.
It is a course I would highly suggest for anyone trying to brush-up their grammar.