It’s essential that teachers’ professional development resemble in its learning processes the kinds of teaching and learning desired in all classrooms.
I made that point in a February 2013 post, and it is worth repeating here.
Mindless professional learning produces mindless teaching
The notes of the lecturer are passed to the notes of the listener – without going through the minds of either. – Mortimer Adler
Mortimer Adler succinctly describes the mindless learning that follows mindless teaching.
Visualize a continuum with that form of teaching and learning at one end. At the other end place the kind of teaching that produces high levels of engagement, meaningful involvement with the subject matter, and the acquisition and exercise of complex cognitive skills. (A good share of the teaching students experience each day falls between those two extremes.)
The professional learning of teachers and administrators can be placed along a similar continuum.
To update Adler’s description, at one end of the continuum the PowerPoint slides of the presenter are passed to the tweets of the students without going through the minds of either.
At the other end is professional learning with qualities that closely resemble those described above for students—high levels of engagement, meaningful involvement with the subject matter, and the acquisition and exercise of complex cognitive skills.
In my experience, the kinds of teaching/learning processes used in professional development have a profound effect on the teaching/learning processes used in the vast majority of classrooms. Put another way, mindless professional learning produces mindless teaching. And vice versa.
The remedy is simple, but not easy: It’s essential that teachers’ professional learning resemble as closely as possible the kinds of teaching and learning desired in all classrooms.
That means that teachers will:
• spend much of their time in small, interdependent groups collaboratively solving important instructional problems;
• gain a deep understanding of important educational issues and their significance through intellectually-demanding learning processes—the close reading of professional materials, writing that extends learning, and dialogue;
• acquire and regularly apply complex cognitive skills in identifying and solving meaningful problems; and
• experience firsthand the value of the methods they are expected to use with their students.
Through mind-full experiences like those, teachers will continuously improve their practice for the benefit of all students.
Dennis Sparks on re·sil·ience 
As always you practice what you teach. No mindless teaching!
And, as always, Sybil, you are very kind. Thank you.