Table summaries are well intentioned, but too verbose. Need more <th scope="row">

Data table summaries are often too long, misuse of heading tags instead of table heading tags.

A 2013 Accessibility report commissioned by Longsight Inc. https://confluence.sakaiproject.org/download/attachments/49119280/Longsight-Accessibility-JT-2013.doc?version=1&modificationDate=1421898888473&api=v2 Identified this issues across Sakai (item 5.2)

Many table summaries are well intentioned, but too verbose and do not help with understanding the table they are associated with.
<table summary=""> should be max 8 or 10 words.

More use should be made of defining an appropriate table cell <td> as a <th> with a row scope, <th scope="row">.

Data tables should not have heading tags (<h3>, <h4>) inside of them for a number of reasons, including preventing an overly long/complex page structure summary.