Parents may remember, back when they were kids, schools had real classes—math, science, history—and fun classes—art and music. Parents may also remember they perhaps didn’t take art or music very seriously, looking at it more like a break from the demands of serious academics than an actual learning experience.
Everyone knows what it’s like to go to work when we’re tired or not feeling well. The day is long, we don’t do as good a job as we usually do, and we’re sluggish and unenthusiastic. If that’s how it is for adults, think of how long and difficult the school day must be for children who aren’t feeling as well as they could be feeling.