This is the standalone price for the grammar supplement course. It is usually Free if you buy one of the other courses, but you can purchase this separately if you wish.
The purpose of the Grammar Supplement is to review Grammar Rules that you may encounter on the SAT or ACT. We recommend that you watch all of the videos; however, after watching the introduction, you may view the videos in any order. We may add more concepts from time to time, so check back every so often.
Also, if you have concepts you would like to see us do, just send an email to firstname.lastname@example.org