Members of the public are asking it. And, at some point, your district will have to answer it, if you haven't already. Some valuable return in the way of student achievement is a reasonable request. School technology raises many expectations. Teachers expect it to help engage students, manage administrative details, and provide new avenues for expression.
Students expect it to be available and working.
The business community expects it to prepare a technology-literate work force. In short, we don't know for sure. Research on school technology suggests that the answers might be buried in a variety of studies that have addressed specific uses of technology in specific instances but have not been synthesized to produce more useful generalizations. Building a case Data gathering might begin with rather inexpert measures, but that's no excuse for not gathering data at all. Assembling data will help you identify what you really want to know and will let you see how to isolate those factors from the other information you have collected.