https://thanksabillion.target.com/
"As part of the social campaign, guests are encouraged to share a message of appreciation through Target’s Facebook page or the Thanks a Billion website, honoring a teacher who has made an impact on their life. When a guest submits a note of gratitude (certain terms & conditions apply), Target will donate $25 to the teacher’s school with the opportunity for each school to receive up to $25,000. But here’s the best part: Target won’t stop until it’s given away a grand total of $5 million. "
