Internet Polyglot is a simple site that is very good for Beginning English Language Learners. It teaches vocabulary in many different languages.

It’s particularly helpful for the many Farsi-speaking refugees coming into my classes – Duolingo doesn’t have a Farsi course, and the Voice of American shut-down the excellent Farsi/English online site they used to have…

I’m adding it to The Best Beginner, Intermediate & Advanced English Language Learner Sites.