*Here “courts” is supplied to distinguish this area from the interior of the temple building itself
aSome manuscripts have “were coming to him”
*Here “and” is supplied because the previous participle (“sat down”) has been translated as a finite verb
*The imperfect tense has been translated as ingressive here (“began to teach”)

In other versions

Early in the morning he came again to the temple. All the people came to him, and he sat down and taught them.

At dawn he appeared again in the temple courts, where all the people gathered around him, and he sat down to teach them.

At dawn he went to the temple again, and all the people were coming to him. He sat down and began to teach them.

but early the next morning he was back again at the Temple. A crowd soon gathered, and he sat down and taught them.

And early in the morning he came again into the temple, and all the people came unto him; and he sat down, and taught them.

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