That’s so cool that you’re a teacher!
I think those were some awesome thoughts from quietly lost. I think being extra prepared (Which you may be already of course! Also ew why’s it so hard?!) could help. If you have thought of your agenda for the class, made it so the tasks are interesting and engaging for you as well as the students (to help keep you all focused!), and have a rough idea of how long you’d like things to last that seems like a great basis to keeping on track, as quietlylost said.
Maybe you could make sure there’s a big clock in the room somewhere where you can easily see it, or maybe you could do something fun with an alarm like set it as music to play when you want to transition and you could all have a real quick dance party to regroup and reset then carry on?? Or you could have the countdown music or something?? Obviously you want space because some tasks may be quicker and some slower than you thought but you could still continue after the alarm if necessary obviously, it’d just be as a guide. Try out different things. Maybe even talk to your class depending on if you think that would be appropriate but they may find it cool to be able to help you out with something?! Idk if any of this is helpful?! Anyways, just being aware of the fact there may be a problem, and trying to fix it makes me think you’re an awesome teacher.
Can I just say as well, @quietlylost you are just the coolest! You always have really amazing advice, always so thoughtful and considered and kind and helpful! I hope you know that!