Link does not work in HTML. I have used "" Tag

My link doesn't work in HTML and I don't know why.

<div class="banner-text">
    <ul>
                <li><h3><a href="chawla.html">HOME</a></h3></li>
                </li><h3><a href="about.html">ABOUT US</a></h3></li>
                </li><h3><a href="cont.html">CONTACT</a></h3></li>
                </li><h3><a href="stud.html">STUDENT's CORNER</a></h3></li>
    </ul>
    <h1 class="big">CHAWLA CLASSES</h1>
</div>