I started studying science when the only teaching method was chalk talk and dictation. And caning was the standard punishment. Started from imperial units then moved to cgs then mks, now SI. I retired early 8 years ago, and get invitations from schools to teach Physics. I have learned and used all technology, and still use them. I know students’ average attention span is less than 5 mins these days. My question is how does the science teacher of today interact with the students more effectively and plan and teach a lesson with least disruption? Are you an entertaining teacher who puts exams out of the equation, and keep students busy all the time ‘doing things’? Then how do you make them learn things for exams? Or are you an academic teacher who teaches to get students pass exams? Or are you that teacher who could balance both? How do you do it? Let us know the secret!