How will I change the world with my vision?

I do believe I can change the world with my vision. So many young students are left to be too independent over the summer time when classes are not in session because their parents work. And especially in lower socioeconomic conditions, most likely both parents work and are unable to afford child care.
I believe that a leader has to balance between aiming high and biting off more than he/she can chew. I need to start small but then always have in the back of my mind strategies to reach my vision's potential. My plan is to start at one elementary school around the Detroit Metropolitan area and try and focus on getting the name of the program and my vision out to the public.
If I am successful at getting my program's name out to the public, I will most likely be able to get more elementary schools and school districts on board with my vision. From there it is a snowball effect if it is successful. More elementary schools, more school districts, more counties, more states, etc.