collection of homework and problems

Today I collected homework from both my control group and my experiment group. I realized that there are quite of few students in the control group who continue to ask questions about texting homework assignments. I have told them that I will start the process during the next unit, after my action research work has been completed. There are still a few students from my experiment group who have not provided consent forms for data collection and have also not provided a text message number that I can use to contact them with homework assignments. I hope that this does not skew my information too much in the future.