'反面教材' 的英文是wt

反面教材 negative example (you can use it as a noun or as a whole sentance)

'Negative example'

'反面教材' 的英文是wt

This is a modern teaching method in high school today.
Reversed literature
or
Odd lessons

Bad example.

反面
1.the reverse side
2.opposite; reverse
3.the wrong side (of fabrics)
4.negative; contrary

教材
1.teaching materials; matters for teaching

I couldn't know 反面教材 is what,but wish this information can help you