Textbooks, especially at the primary and secondary school level, are designed to incorporate the norm of the standard language in all its manifestations-phonology, orthography, vocabulary, grammar, and style. They provide the basis for teaching the skill of literacy to a large portion of the population. Textbooks can, therefore, contribute to rapid codification, especially in centralized educational systems like that of Iraq. This is especially true in a case like Kurdish, which was in the initial stages of standardization when formal education began in the 1920s.
Source: Dr. Amir Hassanpour, "Nationalism and Language in Kurdistan 1918-1985", 1992.