Meaning of a sentence

[patp]

Hi everybody,

Please explain the meaning of this sentence.

you did great work on this assignment -- the best one turned in yet.


Thank you

[Temico]

Hi everybody,

Please explain the meaning of this sentence.

you did great work on this assignment -- the best one turned in yet.


Thank you
You did great work on this assignment (which is )the best one(i.e. work) that has been turned in yet(=up until the present time).