This document outlines the key concepts and skills for 2nd grade mathematics, including counting by 1s, 5s, and 10s; comparing numbers with symbols; understanding place value up to 999; learning addition, subtraction, multiplication, and division; representing commonly used fractions with models; and using mathematical symbols like <, >, and =. Examples are provided to demonstrate place value, addition, subtraction, multiplication, division, and representing fractions with folding strips. The document is intended to guide 2nd grade mathematics instruction.