One of the 5th grade teachers at my school introduced this idea to our students. They've been having a problem with saying things that are not very nice, both in person (at school) and online (after school hours, at home).
I'm not sure where she got the idea, but I thought someone else might be able to use it, so I'm sharing it here.
She has a poster in her classroom. We've been using it verbally when talking to students who seem to have forgotten to think before speaking about the impact of their words.
T - Is it true?
H - Is it helpful?
I - Is it inspiring?
N - Is it necessary?
K - Is it kind?
If it's not, don't say it