Most of the tags that are not supported by HTML5 are not likely to be used by a beginner.
|<big>|| Used by the KompoZer editor and therefore T183 students. Use a CSS style. Example
<span style="font-size: 16px; " This text is larger</span>
adjust the actual size as required
Renders as teletype text
Many of the table and / or cell attributes are not supported. CSS must be used instead.
border, bgcolour, height, width,