Maths
- calculator: Casio FX82 / FX83 / FX85
- alternative: Sharp EL531
- ruler
- stainless steel: Mitutoyo 182-125 / Shinwa H-3412C
- colourful anodized aluminium: Alumicolor Desk Ruler
- protractor
- standard: Staedtler
- higher quality with rotating blade: Starett
- compass
- metal body: Staedtler Mars 555
- plastic body: Staedtler Mars 552