So we made do. Teach 35 kids with 10 books? Handled. Teach a kid with a third grade reading level using your tenth grade text? Done. Learn to teach without running copies? No problem.
And when we didn’t make do we supplemented. Every kid needs a pencil to take the standardized test? They aren’t that much anyway. Make copies of my final exam? If I just buy one ream I can make a class set. Teach a new novel? I wonder how much they are used on Amazon.