Textbooks, which we learned

It covers textbooks, which as I studied thousands of students over the years.
In the years when the Soviet Union still existed, and in the first years after its collapse.
These books we brought stacks at the end of the school year in order to pass to the library and get the next set.
These books someone shore, and some do not.
Someone drew them funny drawings, and some carefully pasted.
These books girls hit on the head during recess boys for what they are pulled by a scythe.
According to these books we have received your knowledge ...
2 + 2 ...
Sum of squares of the legs is equal to the square of the hypotenuse.
F, W and write with ...
































































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