start working on a section of page without waiting other

I have a project in mvc. In the registration page of Students, there are 3 screens. First screen contains the total students of the institute. total number of records are 20,000 approx. second screen shows current day's registered students details. Third screen has registration form.

When page loads, it takes time to load because of 20,000 records of first screen. I want that registration window should load first and start working. It should not wait for other screen records. If other screens are taking time to load, it should be in process at backend but registration window should start working.

What should I do for it?