Rederecting url with router?

[Kristaps]

I have a wireless router, but I have only 1 pc. Our school uses e class, it's where teachers put our grades etc. What I want is that I edit all my bad grades with 'Inspect element', but I want to save it, and when my parents log on to e class thay, click diary(don't know if I wrote it right), they can see all grades, but I want is that when they click on my diary they get rederected to my made diary is it possible? I only need it for 1 PC!