04.09.19A Postcard from Cornerstone Prep in Memphis Ms. Caballero: The Show Call was great; so was the student writing! Darryl Williams and I had the pleasure of visiting two campuses of Memphis’ Cornerstone Prep last Friday. They’re both ASD neighborhood schools–two of the highest performing in the ASD, and not surprisingly I learned a lot from our visit. The school was warm and inviting for students and adults.  In both cases expectations for what happened in the classroom were high…