https://www.canada.ca/…/public-health/services/bullying.html

and

https://www.bullyingcanada.ca/

Excerpt from https://www.canada.ca/…/public-health/services/bullying.html

– Parents and guardians:

Talk, talk, talk. Don’t wait for your child to come to you, bring up the conversation about bullying if you suspect or see/hear something.
Talk to the adults who were in charge when the bullying occurred to find ways to remedy the problem and prevent future situations.
If presented with the opportunity, confront the child, teen or group guilty of bullying and explain to them the hurt they cause.
Stop any bullying behaviour at home, because consistency matters.
Adults responsible for young people (such as teachers, principals, coaches and other leaders)

Be aware of the social interactions in your group of children – separate youth who tend to have negative interactions with others.
Place left-out youth in groups where they will be accepted – try to avoid situations that will victimize at-risk youth (for example, don’t have peers pick group partners or teams).
Support other adults who work directly with youth to end bullying – by enforcing the separation of disruptive teens, increasing supervision in bullying hotspots and placing vulnerable youth in positive groups.