This year I had a real challenging class. The students were reluctant to complete assignments, so I gave them a choice list. It seemed to work. Most students were happy because they got to choose what they wanted to do. I gave them the choice of 6 activities. 2 for 2points, 5points, and 8points. As long as the points totaled 10 points I was happy. Maybe next year I will give 3 activities for each category.
(Idea from a fellow teacher, I just tweaked it for my class)