Now more than ever, public school teachers are digging into their pockets to provide back to school supplies for their students. When they can dig no deeper, students go without.That’s why today, DonorsChoose.org is launching America’s Back to School Challenge, through September 15th. The concept is simple. We have a broad network of supporters across the country. If we all give locally -- to high poverty schools in our own state -- as a nation, we can be a true force for students in every corner of America as they head back to school.To join the Challenge, visitwww.donorschoose.org/back-to-school. Then select your state, and give any amount to a classroom project. Don't let students in your state fall behind!