Hi! I’m not sure if this goes here, but I wasn’t able to find a forum this would fit better in. For students who are majoring in a STEM subject, are there any opportunities that they should pursue in college for the summer? I know Rockefeller has a fellowship, and was looking for similar programs or opportunities. 
Check https://www.nsf.gov/crssprgm/reu/
Deadlines are often in early winter.
Or see https://www.math.arizona.edu/files/undergrad/news/REU/Summer_REU_2021.pdf