When you have those folks in class, even in a Zoom meeting to a degree, you get immediate feedback of how does an idea land? If I present it this way, are they engaged? Or are they clearly not getting it? Whereas you put it out into the world at Brilliant or Talk by Thun or wherever. You don't get that feedback. That's definitely challenging. We do have some signals where we can see if a learner is getting stuck in a particular place and try to figure out what's happening. Sometimes the learners will tell us what's wrong, but most of the time, it's on you to make sure that that lesson works.