There is no bad news!
If you worry about news in the bulletin, then you need to read this: There is no such thing as bad news that applies to you. This is because of a personal management system called Avoidance. Developed in active practice by myself and my colleagues, the key principal of Avoidance is that of rearranging your schedule and lifestyle so that bad things do not happen to you. This done by Avoiding them. Example: If the imposing figure of Mr. Wilkes is coming down the biology corridor towards you, with the express intention of signing you up for house masochism, then Avoidance states that you should, theoretically, be able to reorganise yourself, so that it is not only possible, but imperative, that you should relocate yourself elsewhere. This is done by choosing, at random, one of several pre-prepared situations in which you are. An example list is given below.
All of these are valid, including and especially the last, because of its bizarreness. If a bizarre answer is given to a sane question, the asker will inevitably stop to wonder what the hell the answer means. This is where you make your getaway. Another principle of avoidance comes into play here: Never stop moving. If you stop, people will try and tell you bad things, or get you to do work. Interestingly, although it is actually impossible to do any kind of school work whilst walking around the school, if you keep moving in a purposeful manner, with a folder in your hands, preferably looking angry or anxious, people will ignore you, and assume that you are doing some manner of work.
If the unthinkable happens, and someone stops you and is about to tell you to do something, a pre-emptive strike is the only option: either ask them a question, preferably difficult, hopefully impossible, or, say "Ah, << Insert their name here>> I've been looking for you." This gives you precedence. Now, give them the folder ( which, it should be noted, is a decoy, being both disposable and having none of your handwriting on it ) and say that you found it on a desk in such and such a room, and that someone said that it was theirs. This someone is the blame factor. It is ultimately this imaginary someone's fault if the plan goes wrong, and as such, there is no-one in the plan who is actually able to receive blame.

This ignorance factor is important in avoidance. If you frequently get given things to do, that you don't want to do, in the bulletin, then turn up a bit later than normal for registration, and don't read the bulletin. That way, when you are asked why you didn't go to practice X, Y or Z, you can say, with absolute truth, that your teacher didn't read you the bulletin that morning. The fact that they read it to the rest of the class is neither here nor there.

Advanced techniques: WARNING! This is an example of advanced Avoidance techniques, and should not really be attempted without significant amounts of practice in keeping a straight face. If you know a teacher is looking for you, try and find them. Ask lots of teachers if they know where your quarry is, and make it seem VERY important, to add validity to your tale. This keeps you moving from place to place (Remember, never stop moving), which actually reduces the chance of finding the teacher. If you don't find them, you will probably meet in your next lesson with them. Say that you were looking for them, but didn't find them. Hopefully, those teachers you spoke to whilst attempting to locate them will, if you make it seem important enough to them (being out of breath helps), have told your teacher that you were looking for them. This will inevitably make them believe you, and they will think that you weren't trying to avoid them.
But they may find you. This is the really dangerous bit, kind of like Russain Roulette. Let them ask whatever question they inevitably want to ask you, and in response, say the absolute opposite of the truth, but take out every other word of the sentence, and say what you are left with in an authoritative way. It will make no sense, and will dazzle and confuse the teacher. They will get into an arguement with you as they become convinced that they are deaf or that you are trying to piss them off. They will (hopefully) storm off in a rage of disbelief at your stupidity, but will (maybe) have forgotten about what it was they wanted to ask you.
This is very risky to try, so only use it as a last resort. I mean it. And don't blame me if you get into shit doing any of this, because you've got to be pretty damn stupid to try.