Based on my experience doing very similar projects across China, my advice is to approach the many foreign firms doing business in your target country. Ask them for donations of hardware, expertise and / or cash.
We receive around 1,100 used laptops per year from the Fortune 500 companies doing business in China as well as thousands of volunteer hours (and occasionally cash). We send out emails twice a year and arrange collection of donated hardware.
I also agree that "teaching the teachers" should be the first step.