how to make people understand the importance of rolling
so I am the bjj/wrestling instructor of a college mma club, we spend about 45 minutes demonstrating striking technique then ~45min demonstrating grappling. then we let them spar/roll for the remainder of the time we have which is about 30min sometimes more sometimes less. when we let them go, pretty much everyone goes to strike, and usually only 2 or 3 pairs are allowed to strike at a time so most people just sit around and watch and wait their turn. almost no one rolls, we could have them all rolling at once if they chose to but only 4-5 people ever actually do. This is starting to seriously bother me, I don't really know how to express to them that they NEED to roll if they want to learn, and that the ground is a significant part of mma, which they will never understand or get any better at if they never do it, and if you can't grapple your not going to be striking for very long. So does anyone have any ideas of how I can encourage them to invest a portion of their time in rolling?