The sign looks like is says Group 8 and the sticks could be some form of catcher with net - I can only see the full stick on the girl farthest left, and maybe the more im looking at the image im convincing myself there is a small net at the feet end...The other items look like dumb bells to me to.
If not ball catching sticks, then its to beat the boys and make them cry :-)
Edit----
Nope there are no nets - I saw the sticks on the floor at the front now - forget that idea.....What about some early form of majorettes/dancing equipment ?