in-app purchases for Ed apps. What the Hell? Really?

It is rediculous that developers of apps that are placed in the Education part of iTunes .  There is not a volume license solution to get around this type of purchase.  There are several app that I would like to use but the limits place on the lite side of the apps prohibit me from getting the doing what we need to do.  Hey Devs, I want to give you large amounts of money to use your app, but I can't.  If you are in education and want to use apps that require in-app purchase, please contact the developer of the app and ask for a full version to be released.  I do not want to write bad reviees of apps due to in-app purchase features.   However, if you have this feature in your app, remove it.  Please. YOUR APP IS USELESS TO EDUCATION IF I CAN NOT GET ACCES TO THE WHOLE APP.