If you were building a 3-book “must-have” shelf to support a PLC or mentor a teacher, which titles make the cut—and what’s the one big takeaway from each?

If you had to start a physical book collection of Educational Resources for you to share with either a PLC or a teacher you are helping mentor, what are two or three titles you would start with?

What is the punchline, or two or three key takeaways, that put each book on your list?