Better teaching: Objectives on the board

Why not start each class with a provocative question (on today's topic) to promote engagement and dialog?
Explicit Instruction. Class begins with students reading out the class objectives YouTube video. 7 mins
Excellent, provocative introduction with over 50 comments. Reasons for and against. From

WHY are learning objectives so important? (Thy're not just for inspections)

Link John Hattie on YouTube. 5 mins
7 reasons: Why we need to kill boring ‘learning objectives’! Link An interesting critique of learning objectives