I posted a similar scenario about students not completing assignments outside of class. Someone mentioned trying incentives, like points on a test, especially since I have older students. However, what I already do is offer students 5 bonus points on a test if they take home their test review, complete it, get it signed by a parent, and return it on the day of the test. Since most kids want the points, they will make sure it gets signed; this way, perhaps it can start a discussion between parents and students about what is going on at school. Finally, though I have had people ask me about students forging signatures, I tell them I will notify their parent of their grade, and I have not had it happen yet.

I always strive to develop a sense of intrinsic motivation in my students. I admit, however, that students respond well to rewards. One thing that I try to do is help students see the long term implications. Even students in low poverty schools value money (and want more of it). There is a plethora of research that shows the relationship between education and one's annual salary. It may take a portion of valuable class time, but it may be worthwhile to share some of this data so that the students understand the importance of their education.

I also teach in a high (assumed "low" dealt with amount of money) poverty school and struggle with student motivation as well. One thing we do as a school is have an incentive program after each grading period. If a student has good grades (80 or above) and good attendance (3 or fewer absences), then they are eligable to participate. We have various things such as "phone passes" (kids can play on their phones), homework passes (no homework for a night). The students really like these incentives and it has worked in our school some with motivation. What kid doesn't like rewards?

I tell the students that their education is the one way ticket out of their current situation or city they are living in. Furthermore, an education is something that can never be taken away from them and you get one shot to take advantage of the opportunity of education.