The bref double consists of three quatrains (four-line stanzas) followed by a final couplet. There is a rhyme scheme in there, but with quite a few unrhymed lines, too. I’ve also indulged in an enjambment-y rhyme at the end.
This is another one for the lads (see poem 81).
Some grown-ups like to work in schools
Because they think that kids are great
But others, I regret to say,
Are there because they love the power.
Some teachers think that doing sums
And always keeping all the rules
Are more important than ideas
That it’s a waste of time to play.
Grown-ups who think like this are fools…
But you can’t tell your teacher that!
When you’re grown up you’ll have the tools
To never talk to kids that way
Some teachers can be stupid, cruel.
So laugh at them. You’ll be OK.