Free interactive math tools aligned with Common Core standards
Second grade mathematics focuses on four critical areas: extending understanding of place value to three-digit numbers, building fluency with addition and subtraction, using standard units of measurement, and describing and analyzing shapes. By the end of 2nd grade, students should fluently add and subtract within 20 using mental strategies and be able to add and subtract within 100.
Our tools support 2nd grade math with visual models that make multi-digit arithmetic comprehensible. Base ten blocks let students physically (virtually) manipulate hundreds, tens, and ones. The number line helps students see relationships between numbers and visualize addition and subtraction as movement. Place value charts reinforce the understanding that the same digit means different amounts depending on its position.
Last reviewed: April 2026 · Aligned with Common Core State Standards for Mathematics (CCSS-M)
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1️⃣ 1st Grade Math — review 1st grade foundations if your child needs to strengthen basics
3️⃣ 3rd Grade Math — preview multiplication and fractions coming in 3rd grade