So, it has become kind of a ritual. Every year I take portraits of every kid in my daughter's class. This has been the 5th year and it got me thinking about stuff.
But first, here is the general idea. Each year I go to my daughter's school and take pictures of all the kids in her class. There is no preset date for this, but I try to hit one of two events: Purim (where everyone shows up in a custom) or very close to end of year.
I do not charge for these pictures, nor do I hand businesses cards to the parents. The teacher and parents are free to use the pictures as they please and more than once, the pictures found themselves in birthday calendars, fridge magnets and T-shirts.
I use a very similar setup each year, with the same collapsible backdrop. Usually with one strobe and umbrella on the kids and another gelled on the backdrop.
There is no monetary compensation in doing this kind of project, but I consider it to be one of my best personal projects as it intertwines with so many aspects of my life.