title: [A hygienic evaluation of textbooks for the senior grades].
abstract: Difficulty presented by text-books is a leading factor that forms relations in the pupil-school system. Text-books on algebra, chemistry, geometry, and Russian for secondary forms are most difficult in their component complexity and abstruse character. The difficulty of educational texts increases with the 5th to 8th forms.
authors.forename: N P
authors.initials: NP
authors.lastname: Grebniak
authors.forename: E V
authors.initials: EV
authors.lastname: Verbakhovskaia
authors.forename: V V
authors.initials: VV
authors.lastname: Mashinistov
authors.forename: V Iu
authors.initials: VIu
authors.lastname: Demenkov
mesh_terms: D000293:Adolescent; D006801:Humans; D008603:Mental Health; D008606:Mental Processes; D012426:Russia; D013782:Textbooks as Topic