J.S.
Our school does a walkathon and all kids participate wether they raised money or not. I don't know if you are saying you strongly oppose the fact that they are soliciting money or you just don't want your child soliciting money. If you are opposing even her participating during the in school part then just don't send her that day. If you just don't want her collecting the money then she will be fine. They will still allow all the children to participate. My kids didn't even realize we didn't send any money. Actually they are too young to actually care because they still got to participate.