Bonjour, oui oui bien sûr :)

Réponse:

1. heard entendre
2. suffered souffrir
3. was (be) être
4. didn't know (not know) ne pas savoir (je ne suis pas sûre de celui-là... peut-être avec knew car c'est le prétérit de know il me semble)
5. happened arriver
6. decided décider
7. asked demander
8. helped aider
9. launched lancer/le lancement de qq. chose
10. started commencer
11. reacted réagir

Voilà voilà, j'espère avoir pu t'être venue en aide hehe :)

Bonjour

Last month, I heard that some students in my school suffered from bullying. I was surprised because I didn't know this happened in my school. I decided to launch/ ou/ start a campaign . I asked all the students to help me and they really helped a lot ! Three days after we started/ ou/ launched the campaign, many students started to say they were victimes. Then, the teachers also reacted.

....

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Bonne journée