Just a quick note - right now, for a very short time, the Brainology course is available for the low price of $19.99 at homeschoolbuyersco-op.com so if you have ever considered this, now is the time! That is 75% off the cost.
Brainology was created by Carol Dweck as a way to help middle school/high school teens get passed a fixed mindset. My kids did it and really enjoyed it and learned a lot. Expect to spend about 5-6 hours total, over a couple of weeks. Don't rush it.
I don't make anything off of this. I just wanted to let you know. Homeschoolbuyersco-op.com is a free organization that arranges group purchases for curriculum, passing on savings to home educators.