Copyright has been a hot topic of discussion amongst librarians and can be quite difficult to get a handle on. Here are a few links that might help:
:: Australian Library and Information Association : Book industry partners come to agreement on copyright

:: US School Library Association​ : ​A Crisis—as in School Closures Due to Coronavirus—Justifies Fair Use, Say Librarians

​:: ​Here is a great graphic from @KayOddone and AIS which is based on this information  and here from the Australian Libraries Copyright Committee .
Here is a very practical article from EdSurge Can Teachers Read Books Out Loud Online? Actually, Yes. By Kristina Ishmael, Meredith Jacob and Peter Jaszi, Mar 30, 2020