on-the-spot checking

noun
UK /ˌɒn ðə ˈspɒt ˈtʃekɪŋ/
US /ˌɑːn ðə ˈspɑːt ˈtʃekɪŋ/

Checking something right away, exactly where you are.

The teacher did some on-the-spot checking of our homework at our desks.


OTHER MEANINGS

2. Looking at something quickly at the place where it happens.

The guard's on-the-spot checking of tickets kept the line moving fast.

3. Testing something immediately instead of later.

On-the-spot checking of the machines helped them find the problem early.

4. A quick look to make sure everything is okay right then.

Her on-the-spot checking of the campsite made everyone feel safe.