If you click the Down Arrow on Header Area, It will show the Add form. You can add the data whatever you want.
If you filled the add form, click the Add student button. The data will be added to database and will be showed on Home page. It does without page reloading.
If you click a Update button on any student details , It will show the Update form. You can change the data whatever you want.
If you changed the data, click the save student button. The data will be saved and updated to database and will be showed on Home page. It does without page reloading.