Overall, we will establish whether using our technology to perform tasks that are more or less game-like and functionally relevant to driving will make a difference in the impaired arm after stroke. Two groups of stroke survivors will be followed while they complete therapy. We have three main aims. In aim #1, we will determine whether therapy using functional tasks compared to simple rote tasks lead to significant increases in the use of the arm during therapy and the arm improvements experienced by the subjects after the therapy. In aim #2, we will measure how each group engage in the more and less functional therapy and monitor their effort and enjoyment during training. This aim will help us to determine the value of more fun training. In aim #3, we will upgrade our technology for use in the home therapy environment and follow some subjects to determine if the results change in under supervised condition (at home)