Physicopoeia

φυσικοποιΐα
THINGS I WISH I'D KNOWN WHEN I STARTED TEACHING PHYSICS

Deriving the Bohr Model of the Hydrogen Atom

This doesn't explicitly appear on many school-level syllabuses nowadays, but it does make a nice extended algebraic exercise which has major historical importance. If you search on-line, you will find most derivations are aimed at undergraduate level which can often be unhelpful for school Physics pupils. This worksheet gives a short historical preamble before taking pupils through it step-by-step (though they will need to have done basic electric fields first) before ending with a historical postlude:

The Bohr Model of the Hydrogen Atom.pdf