JSFiddle - React, Tailwind, and code Playground

HTML

<div id="assign_menu_bar">
    <div class="in_blk">
        <div class="ed_button"><span>Create New Assignment</span>
        </div>
        <div class="ed_button"><span>Copy and Create New Assignment</span>
        </div>
        <div class="ed_button"><span>Send for Feedback</span>
        </div>
        <div class="ed_button"><span>Assign to Class</span>
        </div>
        <div class="ed_button"><span>Delete Assignment</span>
        </div>
    </div>
</div>

CSS

#assign_menu_bar {
    margin-top: 22px;
    width: 1024px;
    height: 50px;
    text-align: center;
    display:table;
}
.ed_button {
    background-color: #F9A11A;
    word-wrap: normal;
    text-align: center;
    display: table-cell;
    font-size: 14px;
    width:120px;
    height:45px;
    vertical-align:middle;
    border-right:5px solid white;
}
.ed_button span {
    display: block;
    margin-top: auto;
    vertical-align: middle;
    height: auto;
}