: Full alignment with the Russian curriculum standards for: Whole numbers and place value. Decimals and their operations. Introductory geometry and data analysis. Ratios and algebraic properties. Reliable Resources
ThriftBooks or Amazon for purchasing physical copies of the "Elementary Mathematics" series. gotovye domashnie zadanie po matematike 5-6 klassov dorofeev
Goodreads Book List for a comprehensive overview of his titles. : Full alignment with the Russian curriculum standards