Mueller and Oppenheimer (2014) published the best articulated argument against the use of laptops during class. Carter et al. (2016) having a working paper that reiterates the same point.

We present findings from a study that prohibited computer devices in randomly selected classrooms of an introductory economics course at the United States Military Academy. Average final exam scores among students assigned to classrooms that allowed computers were 18 percent of a standard deviation lower than exam scores of students in classrooms that prohibited computers. Through the use of two separate treatment arms, we uncover evidence that this negative effect occurs in classrooms where laptops and tablets are permitted without restriction and in classrooms where students are only permitted to use tablets that must remain flat on the desk surface.

Laptops are terrible learning devices. Put them away during class. Students curious how to take good notes without laptops should read my guide from two years ago.