As in any specialized profession, the world of ESL/EFL/ELL has its own unique terminology. I quite regularly come upon words that I’m not familiar with.
I thought a short “The Best…” list might be useful for readers.
I haven’t found one glossary of these kinds of terms that I would consider “complete” and accessible, so I’m listing a few of them.
Here are my picks for The Best Guides To ESL/EFL/ELL Terminology:
The American Institutes For Research has a good document titled Common ELL Terms and Definitions.
Colorin Colorado has a good glossary.
— Alison Schofield (@educatorbmls) April 7, 2017
An ELT Glossary comes from An ELT Notebook.
The NILE ELT Glossary is also good, though you have to register (for free) to access it.
Other suggestions are, as always, welcome.