Khan Academy

Khan Academy is on a mission to give a free, world-class education to anyone, anywhere. Their personalized learning resources are available for all ages. Video learning segments are followed by practice activities. Grades: K–12; cost: Free

Imagine Math

Imagine Math teaches math skills from basic math to Algebra I and Geometry to Grade 3 to 8 students through personalized learning paths driven by the Quantile® Framework.

Mathway

It is an automated tutor that provides students with the help they need to understand and solve their math problems. Got a tough math problem? Simply ask Mathway by typing it in and receive an instant step-by-step solution.

Prodigy

Math games that tackle more than 1,200 crucial math skills in a fun and engaging way. Grades: 1–8; cost: Free for teachers; $ for family subscription

IXL Math

Make math about more than numbers! Engaging items, real-world scenarios, and unlimited questions. Individualized math practice. Teachers can choose the strand and set up students to work independently. Grades: K–12; cost: $

WolframAlpha

It is an online service that answers factual queries directly by computing the answer from externally sourced "curated data", rather than providing a list of documents or web pages that might contain the answer as a search engine might. Just simply input the question, you will get the answer within few seconds.

Quizizz

Quizizz allows you to conduct student-paced formative assessments in a fun and engaging way for students of all ages. The salient features include: Student-paced: Questions appear on each student's screen, so they can answer questions at their own pace, and review their answers at the end.

Kahoot

You know it; your kids love it. Why not use it to teach math? Engage your students with this game-based classroom-response system played by the whole class in real-time. Multiple-choice questions are projected on the screen, then students answer with their smartphone, tablet, or computer. Grades K–12; cost: Free 30-day trial; $ subscription

VirtualNerd

More than 1,500 video lessons ranging from middle-grade math through algebra 2. Grades: 6–12; cost: Free

Demos

An online graphing calculator that students can use for free. Includes a teacher-centric activity builder for creating digital math activities. Grades: 9–12; cost: Free

National Library of Virtual Manipulatives

This National Science Foundation-supported project provides a large library of uniquely interactive, web-based virtual manipulatives and concept tutorials for math instruction. Grades: K–12; cost: Free

Art of Problem Solving

Along with textbooks, Art of Problem Solving has a stable of robust online resources, including videos, math problems from math contests, and online classes. Also features after-school enrichment resources. Grades: 2–12; cost: $

ALEKS

From McGraw-Hill, a web-based assessment and learning system that uses adaptive questioning to determine students’ needs. It also instructs students on topics they are most ready to learn. Grades: 3–12; cost: $

Freckle Education

Allows kids to practice math at their own level and pace. Has more than 30,000 math questions, starting with a diagnostic that assigns material at just the right level. Front Row also features lessons, assessments, and reports for teachers. Grades: K–9; cost: Free for teachers; $ for upgrades and other features

KenKen

KenKen® is a puzzle game that helps students improve their calculation skills, logical thinking and persistence. The goal is to fill a grid with numbers so that no number appears more than once in any row or column. In addition, the numbers must combine to form a target number using a specific operation.

Illustrative Mathematics

At Illustrative Mathematics, our mission is to create a world where all learners know, use, and enjoy mathematics. This is not just an idle wish, one that we have because we love mathematics. Sometimes knowledge of mathematics translates directly into power to do good.

Math Central

Run by the University of Regina in Canada, this site offers free resources for math teachers and their students, including a database where users can search for the answers to math questions. Their Mathematics with a Human Face page includes information about careers in mathematics as well as profiles of mathematicians. Grades: K–12; cost: Free

Geogebra

Another graphing calculator for functions, geometry, algebra, calculus, statistics, and 3-D math. Includes practice sheets. Grades: 9–12; cost: Free

Delta Math

A website that allows teachers to assign math practice content to their students. Students get immediate feedback as they complete the problems. Grades: Middle school+; cost: Free

Hotmath

Hotmath provides homework assistance for high school and college students, using “worked out” examples of math problems. Grades: 9–college; cost: Free

Mangahigh

A popular game-based site for math online learning resources. It covers algebra, geometry, statistics, and more. Grades K-12; cost: Free during the coronavirus school closures.

Mathhelp.com

In-depth lessons with videos, guided practice, interactive self-tests, and more. Grades: 5–12; cost: Free

Quizlet

Students can create study flashcards, play learning games, practice skills, collaborate with other students, and more. Grades: 5–12; cost: Free

That Quiz

Simple math test activities for teachers and students, from beginning math operations to calculus. You set the skill level, how many problems, and time limit. A report, which tallies right and wrong answers, is provided after each quiz. Grades: 3–12; cost: Free