Besides age group, you can also consider the gender roles as well. Let’s say, if you study the kids of 15-17 years, you would be able to evaluate the perception that boys are more inclined towards the technologies than girls do. So you can also explore this. Second thing can be the method of teaching. Are the students given informal or formal coaching? Because digital classrooms & mixed method learning brings a sense of informal attitude towards studies. It will help you in analysing whether digital environment is integrating the knowledge acquisition skills or not.