Open a joint account at your bank. It makes it very easy to transfer funds into her account when needed (especially when they go off to college and get their monthly allowance). Also, a secret benefit is that you can go online and watch what she is spending.
However, a little warning… your bank will charge a ‘transaction’ fee on each ATM withdrawal. And, if your D does not pay attention to what ATM they are using there will be a separate $5 bank fee. So, check very carefully what the ‘sister’ banks are where she is traveling and make sure she uses that bank for ATM withdrawals. On the other hand, most credit cards do not have a transaction fee. So it is actually cheaper to do purchases with a credit card, but they cannot withdraw cash from ATMs with credit card.
It was a life saver that I kept diligent watch over my Ds account - she is studying abroad. She did not lose her credit card but somehow some slimeball got a hold of her CC nbr and suddenly there was a large KLM airline purchase from Paris to Saudi Arabia that was caught immediately. Big pain in the butt to get the card cancelled, reissued and then I had to send the card securely over to her college in France.