So if she's a senior I guess she has some income she can prove? Otherwise you may have to co-sign for it if she's still under 21. If she doesn't have any other debt on her credit report to build a risk profile I'd probably stick with cards designed for students as the first one. Once she establishes a history with that and maybe gets some higher income with that fancy degree the better rewards cards are possible.
But there are still good student rewards cards, if she can be responsible and not over extend because of the rewards. Personally Discover and Citibank were two of my first cards (although, sadly, probably longer ago than is relevant now, hehe). Looks like both the Discover it cards have student versions, which get the same main benefits plus some. Might have to look into it more but the Good Grade Reward seems like it's a cashback bonus and the cashback bonus is matched on the first year so that sounds intriguing.
https://www.discover.com/credit-cards/student
Citibank does a ThankYou points card for students. It's a Visa, I think, if you're concerned about wide acceptance (not sure where's she's headed for spring break). I think it's a little easier to get this one too and folks here have good things to say about ThankYou points. (but as I said, it's been a while since I got my citi student) But that does make me think, have you checked her credit score or report? Even with student cards there's thresholds the issuers set. Need at least a Fair score for most, and some might even need Good range. Otherwise you may have to look at secured cards, or co-sign.