It would be so much nicer if one didn't need to scroll up and down the page during the exercise. Surely by resizing some of the components on the screen it should be possible to dispense with the need to scroll between each segment of the exercise, no?
Of course, if a cell phone is used that might cause more scrolling etc but on a 14" laptop screen it should be easy enough to presnet a page that's more concise . . .