Children start primary school when they reach school-maturity, usually in the year in which they have their 6th birthday (7th if they were born after May 31).
Primary education can last for 4, 6 or 8 years. 8-year education is the most widespread; the other two options were introduced in the early 1990s.
Subjects include literature, grammar, mathematics, music, art, Physical education, environmental studies (from 1st to 5th grade), biology (from 6th grade), geography (from 6th grade), history (from 5th grade), history of art, physics (from 6th grade), chemistry (from 7th grade), one or two foreign languages (usually English, German or French). Before 1990, Russian was compulsory.