First 55 is a website designed to teach the “first 55” words someone is supposed to learn to read (I assume, though can’t be sure, that they chose the fifty-five most common sight words).
It seems like a pretty accessible site for Beginning English Language Learners. It does require a quick sign-up and registration and, because of that, I won’t add it to The Best Websites To Help Beginning Readers. Practically none of the sites on that list require registration, and offer much more extensive activities.
It allows parents or teachers to add students and then be able to check on what they’ve done. Because of that capability, I am adding it to The Best Sites Where Students Can Work Independently & Let Teachers Check On Progress.
Thanks to Teachers First for the tip.