I've only taken a half-dozen college-level math courses but I don't think I've seen any cursive letters yet. If we were going to teach kids cursive in case they one day take higher-level math, we should also be sure to teach them the Greek letters because those are used all the time. Of course the vast majority of people don't need to, don't want to, and won't ever take higher level math, so I'd say that teaching kids cursive is an utter waste of time. The time spent teaching cursive could be put to so much better use (e.g., more time devoted to science instruction), and while it's a bit awkward to learn to write new letters at a later age, I much prefer it to the endless cursive drills.