See list of publications on projects here
The projects I have supervised are either final undergraduate projects or
70\% of the grade in a one semester Computational Physics course.
It is hard to find a level for these projects that do not demand too
much overhead from students or mentors, yet achieve useful results
for future students and an
educational experience for the student. We do not want to overwhelm the
student with entire courses worth of new physics, but it is good that
they also learn some new concepts and ideas.