JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css">
<div class="span4">
    <div class="btn-group"> <a class="btn btn-link dropdown-toggle" data-toggle="dropdown" href="#">
              <h3>Choose Child</h3>
              <img id="mainIcons" src="boyStudent.png" alt="boyStudent">
               <span class="right-caret right"></span>
         </a>

        <ul class="dropdown-menu rightMenu">
            <li>
                <div class="btn-group"> <a href="parent_homepage_2.html" style="text-align:center;" class="btn btn-link operationsButtons">
                   <h5>A</h5>
                   <img id="mainIcons" src="boyStudent.png" alt="boyStudent"></a>
 <a href="parent_homepage_2.html" style="text-align:center;" class="btn btn-link operationsButtons">
                   <h5>J</h5>
                   <img id="mainIcons" src="girlStudent.png" alt="girlStudent"></a>

                </div>
            </li>
        </ul>
    </div>

CSS

.rightMenu {
    position:relative;
    float:right;
}
.right-caret {
    
    border-bottom: 4px solid transparent;
    border-top: 4px solid transparent;
    border-left: 4px solid #000000;
    display: inline-block;
    height: 0;
    opacity: 1;
    vertical-align: top;
    width: 0;
    
}
.right
{
    float:right;
}