Salter-Harris is a classification of fractures involving the growth plate. The relevant mnemonic is SALTR.

1. Solo: only through the growth plate
2. Above: through the growth plate and above it into the metaphysis, which is the bit of bone towards the shaft of the bone
3. Lower: through the growth plate and below it, more towards the extreme end of the bone
4. Through: through the growth plate, as well as above and below it
5. Rammed: a crush injury that squishes the growth plate

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If you ever have trouble memorising acronyms, there is a simple fix. And that is the power of group study sessions.