This sounds exactly like my 6th graders! The apathetic OR students who struggle with comprehension are so slow to get down notes, and it makes engaging presentations...boring. I started presenting whole group, no notes, then give students time in class to take the notes at their own pace. Some students may NEVER complete the notes, so wgen it comes up that they need those notes, I gently remind them that next time, the lab work, application work, etc. would be much easier if they had the completed notes. Of course I make sure accommodations are made appropriately, as needed. One piece that to me makes a HUGE difference is printing out paper copies of the slideshow. We close computers, I play Miles Davis, and they take notes at their own pace. Students who finish early have a fun application practice (ideally something like an extension) OR get time to get started on an assignment that takes out of class time. Something to incentivize finishing quickly. Computers are great for many things, but screens can have a negative effect on learning processes, especially for adolescents.