I am a Sophomore currently and am wondering does USNA use STEM as purely a recruitment camp or does it have some effects on an application to the academy like the Summer Seminar would?
Between the two answers you listed, I guess it was a recruitment camp because of the following reasons:
A. STEM is not as highly advertised as NASS.
B. STEM was more based on academics and interest towards math/science.
C. It was a chance for younger students to visit/stay at USNA for a week.
D. Unlike NASS, I am pretty sure you were not evaluated on your performance.
(these are all inferences based on my experience last summer)
There were a few people I met that seemed unmotivated about applying. Yet again, there is at least 2 people I met last summer that have been accepted to NASS already.
120 were selected from about 1000 (a lot less than the number of people that apply to NASS).
I guess by going to STEM, USNA notices that you had an early interest in USNA.