Today we'll let a member of the class lead the discussion. It will be a good educational experience.
(I stayed out too late last night and didn't have time to prepare a lecture.)
The gist of what the author is saying is what's most important.
(I don't understand the details either.)
The test scores were generally good.
(Some of you managed a 'C'.)
Some of you could have done better.
It's been very rewarding to teach this class.
(I hope they find someone else to teach it next year.)