Market Faraday cages for examination rooms! SCIFs4skools™ make money! …solve little (always wondered if the Jeopardy stage is a faraday cage. daily double wage it ain’t)
All things considered, the oral exam suggestion above by Tickyy is likely the best solution (says this old proctor who’s seen crib notes on a subtly scratched leg a couple of times … Red Dwarf Rimmer exam crib scene)
