Of particular interest is the use of project-based learning activities since these are the focus of the NTeQ model. During Year l, there was a significant difference in the observed frequency of project-based learning between the laptop (64%) and control groups (22%). In subsequent years, we would expect to find little if any difference between the groups as all teachers had received the NTeQ training and had access to computers in the classroom. 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? One explanation for the higher-observed frequency of project-based learning during Year 1 may been due to a Hawthorne effect. The teachers were the focus of much attention during the year and observed frequently by administrators, the research team, and individuals from other districts who were interested in implementing the project. In subsequent years, the laptop teachers may have lost some of their enthusiasm and started to modify the NTeQ approach to suit their teaching style and needs.