Like my heading says, I want to display a part of the website in an iframe. Here is the site I want to put in the iframe:

I want to display everything apart from the footer and the GPA Calculator heading at the top. I want to put the rest of the content alone in my website. And on entering the roll numbers, I want students to be able to see their Grades and GPA's. Here's a sample roll number: 1021140050

I just tried this code to put in the iframe, resized it but I don't know how to show a part of it. I googled for many tutorials but couldn't find anything that could fit my purpose. Can anyone please help me out with this?

<iframe src="" height="500px" width="800px" frameborder="0"></iframe>
Thank You