rest // hear it from me

[IQU3838]

Hi,

Could anyone tell me what the two underlined parts mean in the following context? Thank you.

A: Peter is a kid with special needs, but he's the sweetest child. Most of the teachers love him.

B: And the rest?

A: Well, some are better with special needs kids than others, but you didn't hear it from me. A student like Peter can be challenging, to say the least.

[duiter]

and (all) the rest (of it) : INFORMAL
used at the end of a list for referring to other similar people or things that you have not mentioned