Sometimes, a good website needs to be replaced. I've built websites that got old or were built around components that no longer worked properly. Or lacked security because it was no longer worth the effort to update the script. Grace Lutheran School in Jacksonville, FL, had a mix of a few of these problems. Now it does not, even though it still has many of the features from the original website.
From simplified teacher pages to continuously-archived news pages to calendars that work to images that don't slow the site down, it's all good now. More secure with https and more usable by being mobile-friendly.
If you're looking to redesign your school website, Grace might provide an example to help you decide how you'd like to handle your own upgrade. No, it's not perfect, but it's an excellent example of a good website for the price at under $2000.
This can be done through the use of such tools as Google Suite, Gmail, and Google Calendar rather than a web developer having to host huge files and deal with emails.
But it's also what's happening with website design. It can be done faster than ever for a reasonable price.
Grace Lutheran Church's website was also a pretty nice overhaul. https://www.cureforthepain.com/gracelcms.com