ALEKS From McGraw-Hill, a web-based assessment and learning system that uses adaptive questioning to determine your needs. It also instructs on topics you are most ready to learn. Grades 3-12. Cost: Free trial, paid subscription.

Arithmetic Four Two users play a game in which each player tries to connect four game pieces in a row (like game Connect Four). The players answer math questions to connect the pieces. Grades 2- 8.

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: Free trial, paid subscription.

BeatCalc Just like it sounds, this game challenges students to beat a calculator! Features step-by-step directions for performing functions quickly. Grades 3-8.

BrainPOP Engaging animated learning videos, games, quizzes, and activities to encourage kids on their unique learning path. Grades: pre-K-8.

Buzz Math BuzzMath focuses on helping middle schoolers practice their math skills. It contains high-quality problems. It gives immediate and detailed feedback, letting students progress at their own pace. Randomly generated values let students retry problems to obtain mastery. Grades: 6-9. Cost: Free demo, paid subscription.

Coolmath Games Yes, math games can be cool! Check out the hundreds of games on this site and on Coolmath4kids. Grades K-12. Cost: Free, paid for ad-free version.

Corbettmaths This U.K. based resource provides math videos, math practice questions, and worksheets with answers. Grades: K-12. Cost: Free.C

CueThink This National Science Foundation–funded program helps students strengthen math skills, inspires a growth mindset, and encourages critical thinking. Students will learn to solve problems and explain their thinking using mathematician George Polya’s four-step approach. Grades K-12. Cost: Free trail.

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

Dreambox An adaptive learning platform designed to complement classroom instruction and deliver results. Includes resources for teachers, student data reports, and instructive insights. Grades K-8. Cost: Free trial, $ subscription.

Edgenuity Online learning digital curriculum for primary or supplementary instruction. Give students the support they need exactly when they need it. Grades K-12.

eMathInstruction This site provides e-textbooks, answer keys, video lessons, and printables for students and teachers of algebra 1 and 2, geometry, and trigonometry. Grades: 8-12.

Figure This! Figure This! is a site designed to encourage families to practice math together. It includes fun and engaging math games and high-quality challenges. It also offers challenges in Spanish. Grades 6-8.

First in Math We love the friendly competition and game-based content offered by First in Math. Gain skills practice and fluency as you play games targeted toward fact proficiency and logical thinking.

Flocabulary Use hip-hop to learn math! Flocabulary offers songs, activities, and videos. Grades: K-12.

Freckle EducationAllows you to practice math at your 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. Grades: K-9. Cost: Free for teachers; $ for upgrades and other features.

Funbrain Funbrain has been helping students learn key math concepts and develop crucial skills since 1997. Students can choose from a slew of games. Grades: K – 8. Free.

GeoGebra Graphing calculator for functions, geometry, algebra, calculus, statistics, and 3-D math. Includes practice sheets. Grades: 9 – 12.

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

IXL Math Make math about more than numbers! Engaging items, real-world scenarios, and unlimited questions. Individualized math practice. Grades: K – 12.

Illuminations This site, from the National Council of Teachers of Mathematics (NCTM), features lesson plans, mobile games for students, interactive activities, and brain-teasers. Grades: K – 12.

Illustrative Math High-quality educational resources for teachers and students. Excellent math tasks, videos, lesson plans, and problem-based curriculum modules. Grades: 6 – 8. Cost: Free.

Istation Istation makes personalized learning easy with computer-adaptive instruction, assessments, personalized data profiles, and teacher resources. Includes digital lessons and face-to-face teaching strategies. Grades: K – 8.

Jefferson Lab You will love fun math games like Speed Math Deluxe, Mystery Math, Place Value Game, and more. Grades: 3 – 11.

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.

LearnZillion Cloud-based curriculum for K–12 students, focusing on supporting both traditional and blended classrooms. Grades: K – 12. Cost: Free; $ premium version.

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.

Mashup Math has a library of 100+ math video lessons as well as a YouTube channel that features new math video-lessons every week. A free e-book of math challenges is also available.  Grades: K – 8.

Math-Aids Provides free math worksheets for teachers, parents, students. In-depth lessons with videos, guided practice, interactive self-tests, and more. Grades: 5 – 12.

Mathletics Online learning space that is engaging, supportive, and designed to get you interested in math while teaching U.S. state standards. Grades: K – 12. Cost: Free trial for teachers and families; $ subscription.

National Library of Virtual Manipulatives Free site covering topics of: Numbers & Operations, Algebra, Geometry, Measurement, Data Analysis & Probability. Grades: K – 12.

PBS Math Club You will love this entertaining video blog. Not only does each episode cover Common Core Standards, it makes math learning culturally relevant with pop-culture references. Grades: 6- 9.

PowerMyLearning This organization helps students in low-income communities harness the power of digital learning platforms to raise educational outcomes. The program features school workshops, instructional coaching, and professional learning communities.

Prodigy Software 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 families.

That Quiz Free simple math test activities 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.

Quizlet Create study flashcards, play learning games, practice skills, collaborate with your study friends, and more. Grades 5-12

Topmarks A free UK-based site that provides resources for teachers as well as online learning games for students. K-Grade

Virtual Nerd Free site with over 1,500 video lessons for Grades 6-10.

Woot Math Woot Math offers adaptive practice for teaching rational numbers and related topics, such as fractions, decimals, and ratios. Cost: Free tier for teachers. Grades 3-7

Xtramath A free interactive online tool that helps students practice and master basic arithmetic facts. Grades K-8