Science Exhibition Day

My week started with the first class on the first day absent. After I returned to the office, I find a note on our common whiteboard explaining that they (my best class) are on a trip to Bangkok for a science exhibition. First, I would like to know beforehand, second, this is the class I have twice a week and they told me they would miss class on thursday, and third, why is a science teacher not told about the science exhibition.

As the week goes by, my classes are dropping like flies and every time a brave student gets forcibly volunteered by their classmates to have a dreaded "English" conversation with me, I learn a little bit more about why they are missing class. It turns out that they are each working on science projects for today. Naturally, I'm excited and I try to determine the nature of these presentations. Some are dissecting shrimp (they always pronounce it chimp and I really got my hopes up). Others are bending electron beams with a magnet, mixing mentos and cola, or diffusing colors in milk (this last one was very pretty and got translated to me as 'color dance', which I told them was pretty accurate). Again, I wasn't told about this get together of sciences. Nor was I told about the signs that said magic (I assume in a sense that means science is amazing like magic) or the astrology part (the horoscope I was given was printed on a piece of paper in Thai, so I'm not sure if it's accurate or not). A little part of me wants to stay and fix it all, but a bigger part of me is rational.