Experimental textbook (added with a chapter on parallelism from the 2nd edition of 1998. ). - M. : MIROS, 1994. — 200 s . : il. — ISBN 5-7084-0045-5 . Full course of elementary geometry "according to Alexandrov" for a 10-year (at that time) comprehensive school . A trial textbook for Grade 6 was released in 1984, for Grade 7 in 1985, for Grade 8 in 1986 and for Grade 9-10 in 1987. In the nineties, Alexander Danilovich created a series of experimental textbooks, containing material of different levels of complexity and designed for students with different interests and abilities. They were designed for the differentiated teaching of geometry, and their