To develop a feature for the 6th-grade mathematics textbook by Zubareva and Mordkovich , the core functionality should focus on providing step-by-step solutions that align with the textbook's curriculum. 1. Feature Structure & Curriculum

: Embed or link to video walkthroughs, such as the UrokiTV playlist which covers over 600 tasks from this specific textbook.

: A comprehensive online manual for the 2011 edition.

(Operations with fractions, proportions, and percentages). 2. Core Functional Requirements

ГДЗ Математика 6 класс А. Г. Мордкович, И. И. Зубарева 2011

(Opening brackets, simplifying algebraic expressions).