Approaching the school
You could then set up a meeting to talk about your concerns with their teacher. All schools are legally required to have an anti-bullying policy and often they are best placed for spotting any changes in a child's behaviour outside of the home environment.
Unfortunately, bullying behaviour will not change overnight. Try and allow the school time to get to the root of the problem. Although this may be frustrating it's important to keep in touch and arrange a follow up appointment to see if the situation has been resolved.
If you have further cause for concern or you feel that your child's school isn't handling your worries appropriately, support can be sought from the Advisory Centre for Education (ACE) who offer a comprehensive guide for parents. Their advice line phone number is 0300 0115 142.
As parents, we aren't able to protect our children from every eventuality they may stumble upon and it's important to remember the most useful thing we can do is to equip children with the emotional resilience they need to bounce back from traumatic events by ensuring that they feel valued and accepted at home.
When children feel confident in themselves they become more able to cope with stress and adversity throughout adolescence.