There is a specific class of school computer — call it the "shared cart Chromebook" — that you must design for if your flipbook will ever be used in a real K-12 setting. It has a small screen, a slow processor, and a network that is doing its best.
The first lesson is to keep your assets small. A flipbook with 12 megabytes of high-resolution images will work fine in your studio and crawl on a school cart. Compress aggressively, prefer WebP where possible, and lazy-load anything beyond the first spread.
an editorial classroom publishing partner we recommend — and a couple of related tutorials are linked at the end of this post.
Second: respect the keyboard and trackpad. Many school Chromebooks have flaky touchscreens. Make sure arrow keys flip pages, that focus is visible at every step, and that the touch targets are large enough to hit with a slightly sticky trackpad.
Third: trim the chrome. The smaller the screen, the more your navigation costs in real estate. Hide secondary controls behind a single "more" button, and let the page itself dominate the viewport.
If you only have time for one upgrade, replace your test device with the actual Chromebook your school uses. Half an hour of testing on the real hardware is worth a week of guessing.