Education
You can discuss on different courses, books, schools, colleges, universities, scholarship, etc. You can ask questions related to any problem or seek guidance on your issues related to education. Those correctly answering to the questions will get good bonus points. You can also share ways of preparing any exam or how to appear for certain exams.
Here in Spain homeschooling is not common. In fact, I have never heard of any parents homeschooling their children.