Congrats on completing GF2! That's a lot of work. :)

Originally Posted by: ryentzerI'm now working through the Rock I course which is also outstanding. But, I want to gain more skill and knowledge in theory, scales, etc.

What would a good Scale lesson to tackle next after the Core lessons? I'm leaning towards Major Scale Patterns and Positions by Schlegel. Would that be a good next lesson?

Since you mention theory, you might enjoy this tutorial that is a basic overview & intro to music theory.

http://www.guitartricks.com/tutorial.php?input=495

Regarding scales, it depends on what your goals are & what style you want to play. If you are interested in Classic rock or blues based rock then tackling pentatonic patterns in depth is probably going to be more beneficial.

https://www.guitartricks.com/tutorial.php?input=296
https://www.guitartricks.com/tutorial.php?input=185
https://www.guitartricks.com/tutorial.php?input=722
https://www.guitartricks.com/tutorial.php?input=737

And there's more on my instructor page. Just scroll down about halfway until you see the Pentatonic Shapes section.

https://www.guitartricks.com/instructor.php?input=155014

If you are doing more modern rock or melodic stuff then you might find those full diatonic patterns more useful.

https://www.guitartricks.com/tutorial.php?input=453
https://www.guitartricks.com/tutorial.php?input=887
https://www.guitartricks.com/tutorial.php?input=898
https://www.guitartricks.com/tutorial.php?input=899

Again scroll down my instructor page until you see Visualizing Scale Patterns. There are tons of great ideas to learn & practice there.

And you can always do all of them! :) It really just depends on what is a more immediate goal.

Hope this helps! Ask more if necessary & have fun.