I was grading a test for my students, and I was surprised -again- by some of the answers that they can give.
They are happy to measure velocities in units of action, and energies in apples and oranges.
I also get answers of the form
a couple of orders of magnitude faster than the speed of light, or of wavelengths of the form
for an optical transition in the UV. This is only a couple of orders of magnitude smaller than the size of an atom, at distances that we have not yet been able to measure in any lab.
I wonder if there is a cure for this out there: some way to get the students to understand on their own if an answer is nonsense or not so that they can double check their work, rather than believe blindly the result of a bad computation.