More importantly, we would expect the laptop classrooms to maintain a fairly high frequency of project-based learning. There were no significant differences between laptop and comparison groups in the second and third years. Of note, the frequency of observed use of project-based learning in the second and third years in laptop classes dropped to the level of the control group in Year 1. Because project-based learning is central to the NTeQ model, what was the effect of the lower frequency of use on the related teacher behaviors?