2. Ask for support
This is particularly important if you are a new teacher, but it can also be helpful for colleagues with varying levels of experience. One of the main problems with getting back a ‘lost’ class is that you need the learners to be silent and to listen, in order to reset and re-establish the behaviour you want. Unfortunately, the very definition of a ‘lost’ class is that they probably will not listen to you.
What you can try in this situation is using ‘reputation by proxy’ – ask a line manager who is available, such as a head of department, head of year, a deputy head, or even the head teacher, to be in your lesson briefly, right at the start. This should help you gain silence in order to re-establish the ground rules with the group and is likely to make you feel (and come across as) more confident. Do not feel guilty about asking for additional support – your senior leadership team want you to succeed in managing behaviour, just the same as you.
Before they leave, your colleague might remind the class that they will be asking you to report back to them on whether the behaviour of the class has improved. You can then refer positively to this at the end of the lesson, to reinforce any improvements that have occurred.