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]

Just checked out joey weeds,
they are cheap and have some nice
sounding strains.

I'm probably gonna go with apollo 11
and NL x C99.

I heard apollo is "smart weed".

[psteve]

Any phenotype of NL5xHaze will be what you're looking for.
Also Nevilles haze, Amnesia haze, Kali mist... or any Sativa that has been harvested before the trichomes turn amber.