I can arrange my apps in my personal Google account, but can't do that in my school district Google account. I searched several times trying to find out if it is going to be released for school district accounts as well. I will keep you posted on what I find. Please post to the comments if you know the answer to that question.
For more information and more detailed directions, check out the Google support information page on how to switch between products. Scroll down to the section on how to "customize your menu".