What strain for focusing/learning/studying?

[Mr. Purple]

What would be a nice strain to learn or further your knowledge and focus with?

From math to philosophy and etc.

I'm looking for a thinking strain.

Mr. Purple Reviewed by Mr. Purple on 10-03-2007. What strain for focusing/learning/studying? What would be a nice strain to learn or further your knowledge and focus with? From math to philosophy and etc. I'm looking for a thinking strain. Rating: 5