conv: I studied very hard for my ESL certification_comma_ and was sure I would pass the test going in. I recently took my ELS certification test. I studied really hard_comma_ so I'm sure I passed it. What's ELS? Sorry_comma_ ESL. It's English as a Second Language. It just means I am certified to teach students that don't speak fluent English. Ah_comma_ gotcha. A few of my friends teach English to Chinese students online and I think they have taken ESL courses