What are the differences among the different Greek lectures?

There are several different sets of Greek lectures on the website.

1. The lectures on Greek for the Rest of Us are free.
2. The Summary Lectures cover the basics of each chapter in Basics of Biblical Greek. They are free, and you can watch them in the online class.
3. The full lectures cover everything in Basics of Biblical Greek in depth. They are free up through Chapter 6, and the rest are for purchase.