Maths
- calculator: Casio FX82 / FX83 / FX85 ($ varies)
- ruler
- stainless steel: Mitutoyo 182-125 ($31) / Shinwa H-3412C ($18)
- colourful anodized aluminium: Alumicolor Desk Ruler ($6)
- protractor
- standard: Staedtler ($5 for 4-piece set,
$26$24 for stainless steel 4-piece set) - higher quality with rotating blade: Starett (
$118$109)
- standard: Staedtler ($5 for 4-piece set,
- compass: Staedtler Mars 552 ($29)