help instructors prioritize and limit lecture content. Many instructors pack too much information into their
lectures. While this tendency is understandable —instructors want their students to learn as much as possible—
when it comes to how much new lecture content students can learn and retain, less can be more (Nelson, 2001;
Russell, Hendricson, & Herbert, 1984). Constructing GN requires decisions about what is most important for
students to learn.