Here are some ways to keep this from happening to you (see post above)these are classics, gathered from years of tama website searching.One was listed above, but needs a small clarification.
1. You know that book you have already read a hundred times? Cut a tama-shaped hole in the pages one by one, glueing them together as you go. Take the finished product to school (be sure not to glue all of the pages). Got nothing to do? Pull out your "Reading Book". Be sure to turn off the sound!!! (the clarification made was that you do not have to use one of your school books, or a nice book, and I'm not sure the part about leaving some of the pages as they are was mentioned, so you can pretend to actually read it without arousing suspicion, when the teacher walks by, flip the book back a few pages and read away!!!)
2. If the teacher caught you and wants to see what you are holding, go to the time screen and cover the Tama logo with your thumb. Then claim it is a watch. This one will only work for teachers who don't have much experience teaching, because they will obviously have seen tamas if they have taught for more than 2 or 3 years.
3. You can just leave it in your locker and check on it every period. That's the safest way to go.
4. Another handy trick is to ask your teacher if it is alright with her if you check on your tama when you are done with your work, sound off, and leave it in your bag the rest of the time.
Did you not manage to get her fooled? Pause it while you have the chance. Pausing is better than death for the poor thing.
Note: Be extra careful with familitchis, I am not sure that they pause. PM me if you found out they can.
This is not meant to critisise original ideas but put them in a different format for further understanding.