Very very big long shot but...?

Does anybody know the name of this movie? I saw it on ABCFamily around 4 years ago and I liked it. Its about some kid that thinks of an idea about if you help 3 people and they help 3 people that eventually everybody could be helped in one way or another. It started out as some class assignment. the teacher that assigns this project ends up dating his mom. and in the end the boy get killed. this is all I remember sadly :( And I really want to watch it again but don't know the name (Again :( ) If you have ANY ideas pleassssssse click reply (or what ever the word is) and start typing. Thank you