In school swimming lesson on friday another y7 boy (who has previous form as a bully both toward my ds and to others) held ds' head under water 4 times, for 5 - 6 seconds each time. Ds isnt a strong swimmer and repeatedly told the boy to stop. Then ds got out of the pool and was followed by the other boy who then grabbed ds and pushed him into the deep end. School response is to exclude offender from swim lesson next week. I think a stronger punishment is in line because consequences of holding someones head under the water could be dire and irreversible. If it were your ds, what wld you want the school to do?