primary school

If you die die and desperately want your child to be in a particular school, then yes, you can do parent volunteer work to increase your child's chances. Please bear in mind that it still does not gurantee your child a spot. To me personally, PV is going against what volunteering is really about. Volunteering means helping others without expecting any sort of reward... so why do parents do PV just to "bootlick" the school to get a spot? Just my 2 cents in case I accidentally offend someone.