Hello,
I liked your tricks, they are very good..
But it's true that after being a teacher,you have to be very patient...sometimes it look like students are checking patience..
Initially I use to get irritated and started punishing students,but after sometime I realized that it is not a solution..
I will suggest you to try new tricks like while taking class..try to interact with students for some time and then start teaching them..so that it doesn't becomes monotonous and boring for them..and try to be friendly in class,so that they can share their doubts without any hesitation..
Regards,
Nelson