I have to figure it out. Another thing I noticed was the interesting work of Mr. Principal with his voice, which seemed to lead the whole class. I was also struck by the fact that the principal was giving out-of-date information to the children, e.g. there was a periodic table of elements in the class, which was almost missing the complete 7th period today. there was a periodic table of elements in the class, which was almost missing today's complete 7th period. He also talked about 6 rare gases, but since 1999 we have known 7.
I was also struck by the fact that the principal was giving out-of-date information to the children, e.g. there was a periodic table of elements in the class, which was almost missing the complete 7th period today.