Evaluation of 1:1 Initiative on Teaching & Learning

We are in the initial stages of implementing a 1:1 tablet program at the middle school. This year our teachers received a tablet computer and we have done extensive professional development with teachers throughout the year. In the fall, our grade 8 students will receive their devices and then the following year, our grade 7 students.

We want to continually evaluate the impact of this inititaitve in terms of teachers, students, parents, IT support needed, etc. Does anyone have a tried & true tool or assessment method for assessing the impact? What are others using to assess the impact on your investments?