I show concentration when I manage the distractions around me and do my best with my work.

Year 3 Child

Concentration means that you manage your distractions.  I showed concentration when I managed my distractions whilst doing reasoning Maths.  Someone was talking near me so I ignored them.

Year 6 Child

If someone is being silly, you just get on and ignore them. You have to do your work. You can show you are concentrating by just looking at your work, your teacher or the whiteboard.

Year 1 Child