Home › Authors › Geoffrey Colvin 👤 Geoffrey Colvin b. 1941 ยท 6 books Books by Geoffrey Colvin Managing the cycle of meltdowns for students with autism spectrum disorder 2012 Managing the cycle of acting-out behavior in the classroom 2004 Angel Customers and Demon Customers 2003 Managing threats Managing threats 2001 The effective elementary classroom 1997 Generalized compliance training 1983