What (else) should CS educators know? - Revisited

While more and more countries worldwide have realized that computer science is a discipline that high-school students should be exposed to and, at the same time, awareness of the need for designated computer science teacher preparation programs has become more prominent than ever, we look back at our 1998 paper "What (else) Should CS Educators Know?". We believe that most of the principles and guidelines that we coined more than fifteen years ago still stand. We also revisit the course based on that paper, which is the core course in our teacher certification program. We believe this can help policy makers and educators to design a solid well-established pre-service and in-service computer science teachers' preparation program.