title: [Evaluation of the difficulty level of the subjects taught in high schools and colleges].
authors.forename: N P
authors.initials: NP
authors.lastname: Grebniak
authors.forename: V V
authors.initials: VV
authors.lastname: Mashinistov
mesh_terms: D000293:Adolescent; D003479:Curriculum; D004521:Educational Measurement; D006801:Humans; D012574:Schools; D014495:Universities; D016526:Workload