psychologists like stephen calhoun tell us when we are asking students in o classroom to pay directed tention directed attention the captain argu here provides, requires effort. itlays a central role in our abityto focus . some of the time at least we were talking about you can throw it away from us but the one here is the one i want to focus on that. it's susceptible to tea so attention gradually fades over tim it requires more and me effort for us to pay attention overhecourse of an experience . this is true of any kind experience . it varies in intensity, some more than others. they s students can't pay attention er the course ofa 70 minutlecture, they can't but their attention will also fade over thecourse of the 70 minutediscussion. that's just how our attention works. prolonged effort leads to directed attention fatigue . so we want to thk about that. course , great article that organizers post from harvard business review pnt out this is especially true of zm fatigue and one of the things i love in the article is the fact thaon resume reading or resume classroom, we a looking a