 We really try to get ones that are going to solve some sort of pedagogical issue and we've we've tried to do that from the get go when we're piloting new stuff. But I think having having that sort of focus on doing it with some care and not just jumping at the new things just for the sake of it being new because at the same time we don't want to pilot a bunch of stuff that we're not going to look at eventually adopting to I think longevity is part of something we got to look at when we're looking at new tools like if we're going to try this thing out. Let's look a couple steps ahead and look what eventual adoption would look like is it feasible, otherwise you end up running the risk of getting a bunch of people hyped on something, and they had it for a semester and then you can't support it moving forward which doesn't help anybody.