IXL Skill Review and Practice - K-12 learning experience that provides comprehensive, standards-aligned content

https://www.ixl.com/home

Transum - Free mathematical activities, puzzles, problems, visual aids, investigations and challenge

www.transum.org/Software/

Prodigy - Online math game

https://play.prodigygame.com/

Math Guide - Free lessons and interactive quizzes

Pre-Algebra

Geometry

Algebra

Probability Basics

Math Mammoth - Free pre-algebra videos for middle school

https://www.mathmammoth.com/videos/prealgebra/pre-algebra-videos.php

Math is Fun - Math explained in easy language, plus puzzles, games, quizzes, and worksheets.

https://www.mathsisfun.com/

Greg Tang Math - Strategy games - Games, puzzles and summer math challenge

http://gregtangmath.com/

Cool Math 4 Kids - Games and Lessons

https://www.coolmath4kids.com/

Solve Me Puzzles - Puzzles that transition to algebra

http://solveme.edc.org/

Ken Ken - Strategy Games - Puzzles and games

http://www.kenken.com

NCTM- Strategy games - Created by the National Council of Teachers of Mathematics

https://calculationnation.nctm.org/

Sheppard Software - Strategy Games - Strategy games

http://www.sheppardsoftware.com/braingames/braingames.htm

Purple Math - practical lessons on pre-algebra and algebra

http://www.purplemath.com/modules/index.htm

YouCubed - Math Mindset resources

https://www.youcubed.org/

Math Doku - Free online puzzles

http://www.mathdoku.com/

Math Forum - Resources for math topics

http://mathforum.org/library/

Arcademic Skill Builders - Fun and free educational games for kids

https://www.arcademics.com/

Khan Academy - introduction videos, videos that solve real-world problems related to the topic, and practice problems

https://www.khanacademy.org/

Count On - Games and resources. Includes online Sudoku puzzles

http://counton.org/

Absurd Math - Pre-Algebra - interactive mathematical problem solving game series.

http://www.learningwave.com/abmath/

Fun Brain - Math games and videos

https://www.funbrain.com/

Soft Schools.com - Math games and online practice

http://softschools.com/math/games/

Math Playground - Games and Puzzles

https://www.mathplayground.com/

Figure this - math games and challenges for families

http://figurethis.nctm.org/download.htm

Geogebra- interactive geometry website.

https://www.geogebra.org

Math.com - resources for students, and parents

http://www.math.com/students/practice.html

Freckle Math - Students work on math problems at their level

https://www.freckle.com/

Cool Math - Free online math lessons, math games, and fun math activities

http://www.coolmath.com/

Quizziz - Free gamified quizzes for every subject

https://quizizz.com/

Common Core Standards - These standards define what your students will learn this year.

http://www.corestandards.org/Math/Content/7/introduction/