You can buy apps and give them as a gift to other people. If you go into iTunes from a computer or the App Store on an iOS device and go to a particular app, one of the options it gives you is to "gift this app." You can give the same app to several people at one time by just typing in their email address. They will be sent an email with instructions on how to redeem the app. This is a great way to give students an app you want them to use in the classroom if it is not free. However, you will get charged for each email you send an app to, whether or not they actually redeem the app. Also, you cannot use iTunes credit to gift apps. You must use a "funding source," usually a credit card.