Some people on here may already know about the charity Make Space for Girls, which campaigns for teenage girls to have better parks.
It's pretty clear that most things in parks for teenagers, like skate parks and so on, are mostly used by boys. But no one has ever researched this. So they want people to go to their local park and count who is on the teen facilities, and how many of them are girls. Simple. But it will make a difference, as they can prove what is happening.
All the details - and the form to put the numbers in - are on their website.
https://www.makespaceforgirls.co.uk/parkwatch
TIA