checkingaids
nounUK /ˈtʃɛkɪŋ eɪdz/
US /ˈtʃɛkɪŋ eɪdz/
Things that help you look closely at something to see if it is right.
The teacher used checkingaids to make sure every answer was correct.
OTHER MEANINGS
2. Tools used to test whether money or documents are real.
The bank clerk used checkingaids to spot the fake note.
3. Helpers that let you confirm a machine is working properly.
Engineers rely on checkingaids before starting the engine.
4. Study materials that help students test their own answers.
She made checkingaids so her classmates could mark their own quizzes.