Some companies are already using lessons learned at the center.

It is a book based on author's experience and lessons learned.

A lesson well learned, but what good would it do him if he was dead?

Maybe a little bit, but I think that's a lesson learned.

But perhaps the biggest lessons learned from making the movie, they say, were personal.

History is a great teacher and lessons learned once can avoid problems in the future.

Good lessons to learn, but all together a nice surprise.

And lessons learned from one mistake can lead to another.

But a lesson as good we might be learning elsewhere.

All the lessons he had to teach me I'd learned.