Tableau

<style>
table, th, td {
border: 1px solid black; text-align: center;
}
</style>
<table>
<tr>
<th>Cours</th>
<th>Lundi<th>
</tr>
<tr>
<td>1ère heure</td>
<td>Sciences</td>
</tr>
<tr>
<td>2ème heure</td>
<td>Histoire</td>
</tr>
</table>