Q. Re: Is a tuition waiver considered a scholarship?
A. Usually not, but it depends on how it is reported to you.
When done correctly, there is no tax document reporting (remission is simply a tax free employee discount). That, is neither tuition or scholarship is shown in boxes 1 and 5 on your form 1098-T (typically you don't even get a 1098-T). The remission/waiver should not be reported on your W-2 or a 1099-misc.
If the school does report it as a scholarship (usually box 5 of the 1098-T), then you treat it as a restricted scholarship (must be used for tuition) for tax purposes.