Timetable

HTML

<body>
  <table class="separated">
    <tr>
	    <td>
        <div class='cell_header'>
          <p class="group">s1</p>
			    <p class="classroom">N228</p>
        </div>
			  <h3>S: ICT</h3>
			  <p>KOH</p>
		  </td>
	  </tr>
	  <tr>
		  <td>
			  <p>s1 N228</p>
			  <h3>L: ICT</h3>
				<p>KOH</p>
		  </td>
    </tr>
  </table>
</body>

CSS

*{
	padding: 0px;
}
table, td { /* just defining table makes an outer border. to put the borders around the cells you need to define td aswell */
	border: solid black 1px;
	border-collapse: collapse;
	text-align: center;
	column-width: 200px;
	height: 100%;
}
.separated td, .separated{
	border: 0px;
	border-bottom: 1px solid black;
	height: 100%;}
.cell_header p {
	display: inline;
	position: relative;
	overflow: auto;
	margin-top: 0;
}
.classroom{
	text-align: right;
	float: right;
}
.group{
	text-align:left;
	float: left;
  }