Tyaja uses the think test
(Book)

"In mindfulness class one morning, Ms. Snowden tells her students about the THINK Test. Before they say something, she explains they should ask themselves four questions: Is it True? Is it Helpful? Is it Necessary? And is it KInd? If it isn't all those things, maybe it's better left unsaid. When Tyaja sees her friend Rosie on the playground later that day, she thinks Rosie's new haircut looks terrible. But before she can say that to Rosie, the THINK Test team intervenes..."--Jacket.