For people wanting ISOs of older builds e.g. 1507, 1511, etc. Easily obtainable through Rufus.
Windows 10 Pro for Education is not the same as Windows 10 Education. The latter is the Enterprise version with only a minor variance.
So just get that latter one instead if you want an Enterprise version. You will still need to activate it, but like all installs, it doesn't need to be done immediately.