: Many problems are set within a story—featuring recurring characters—which helps maintain engagement and provides a "reason" for the math.
: Transitioning from two-digit to three-digit numbers, focusing on place value. matematika 3 klass 1 chast demidova v illiustratsiiakh
Matematika. 3 klass. Uchebnik v 2-h chastyah. Ch. 2 - Amazon.com : Many problems are set within a story—featuring