COSMOS Recommendation letters - were both STEM?

Those who applied for COSMOS or are applying, did you opt to send both STEM recommendations? Were both from current school teachers or was the second from another mentor / tutor?
My first recommendation is from my AP Calculus BC teacher.

From what I heard during info session, both letters from STEM teachers will be the best. If not, at least one is from a STEM teacher. Rec letters from tutor/mentor outside school are not good. They want someone who really knows you in a classroom setting.

Hi Pickle5- thanks for responding back. This is very helpful.