An excellent beginning to your search for a research project is this article on the University of Michigan-Flint webpage.

I recognize that the article refers to a much broader scope of research topics than will be suitable for a STEM research proposal. As you select your research topic, be certain that it relates to STEM disciplines.

 

These websites that can serve as a starting point for selecting a STEM topic of interest:

Science News For Students

Science News

Emerging Investigators