NSF is supporting additional DIAMONDS scholars at Tufts through the DIAMONDS REU. Applicants for the NSF DIAMONDS REU must be US Citizens and Permanent Residents who are current undergraduate students matriculated at US colleges at Universities (you must not be graduating before December 2022).
You can apply through the NSF ETAP portal:
https://www.nsfetap.org/award/191/opportunity/190
Applications are due by April 8.