How do I show a list of essays or other texts that open when clicked?

Add an Expandable Text block to the page in Website Builder. Each entry has a Title, an optional Note (a line under the title, such as an author, a source or a date) and its Text. Visitors see the list of titles and notes, click a title to open its text under it, and click it again to close it. The text is in the page whether it is open or closed, so search engines can read it.

For questions and answers, use the FAQ block. It opens and closes the same way and also describes its entries to search engines as questions and answers.