Why the season matters more than a single day
Students who start looking in May are usually looking at programs whose applications closed months earlier. Winter deadlines are the common pattern for residential research and for agency internships. The day itself moves every year, which is why this site does not print a date on a public page.
A useful short list is small on purpose. The three programs below are examples of the kind of summer research students ask about. They are not a ranking, and they are not the whole catalog.
What an account adds
Inside Scout you can filter by grade, city, pay, and deadline, and save the ones that fit. The public sample stops at a name, a place, a type, and the season applications usually fall in.
Opportunity
Research Science Institute
Center for Excellence in Education
Cambridge, MA · Summer research
Applications are usually due in winter
Research Science Institute is a residential summer research program for high school students, run by the Center for Excellence in Education.
Opportunity
MITES
Massachusetts Institute of Technology
Cambridge, MA · Summer STEM program
Applications are usually due in winter
MITES is MIT's program for high school students who want a structured introduction to science and engineering.
Opportunity
Summer Internship Program
National Institutes of Health
Bethesda, MD · Research internship
Applications are usually due in winter
The NIH Summer Internship Program places students in research groups at the National Institutes of Health.