Lots to schools have opted to use Google Classrooms. Some have been given ChromeBooks by the schools, other may need to use to family computer. For a number of reasons, you may want to isolate your child’s OS and Internet activity to a separate device. To bridge the gap, Neverware has a free version of ChromeOS that works on many PCs and laptops. I was successful using a Dell Optiplex 9010 all in one.
Here’s a link to their USB Installer.
(WARNING! USB FLASH DRIVE WILL BE ERASED!)