Interactive math lessons and tutorials websites
For all grades
CK-12 is a large, free site for learning and practicing math and science. It contains text-based lessons, FlexBooks® (digital textbooks in PDF, ePub and mobi formats), videos, and quizzes for multitudes of math and science topics from K to grade 12.
National Library of
Virtual Manipulatives for Interactive Mathematics
Lots of interactive activities for K-12, on numbers & operations, geometry, algebra, measurement, data analysis and probability.
BrainPop Math Topics
Dozens of animated movies on various math topics that will keep your attention focused! Each topic/concept also has a quiz, activity page, an experiment, a timeline, and a short comic-strip. Can watch two movies free daily, or buy a yearly subscription for unlimited access.
Math Goodies is a free math help site that launched in 1998. Math Goodies was a pioneer of interactive math instruction and free math homework help. Today this award-winning site has over 400 pages of activities for students, educators and parents.
Online Interactive Mathematics from Teaching Treasures
Lots of interactive worksheets full of questions where you type in answers in individual check boxes for all grades.
Wolfram Demonstrations Project
Thousands of free interactive Mathematica demonstrations/visualizations in for math, science, music and art for all levels, including advanced mathematics. These require that you first download and install the free Mathematica Player; then you download the individual demonstrations.
Visual Math Learning
Free tutorials with some interactivity about basic operations and all fraction operations. Emphasizes visual models and lets student interact with those.
Math Exercises for Kids
Simple online exercises on a variety of topics, including the basic operations, simple word problems, measuring, time, and mystery numbers. Several levels available for about grades K-4.
A Maths Dictionary for Kids
An animated, interactive online math dictionary for students which explains over 600 common mathematical terms and math words in simple language.
Virtual Manipulatives from Glencoe
From PreK till 4th grade, a set of virtual manipulatives to play and demonstrate math concepts with. Includes attribute buttons, base ten blocks, bears in a boat, calendar, bucket balance, clock, connecting cubes, centimeter cubes, and more.
Mostly middle school
Free learning guides (tutorials) for all prealgebra topics with interactive practice problems, step-by-step examples, graphs, and real-world applications. This can be used for an online pre-algebra textbook.
Numbers and Operations
Lots of online interactive manipulatives for subjects such as basic operations, fractions, number line, percentage, Sieve of Eratosthenes, relating area and multiplication.
An online middle school math software (for students ages 10-16) that includes interactive & realistic simulations, lots of visual representations, real world applications, and problem solving for all mathematics strands (algebra, geometry, numbers, data analysis, probability). Subscriptions $49 for 12 months.
Mostly high school
Mathematics Tutorials and Problems (with applets)
Several java applets that help you explore mathematical concepts and topics (equations, functions, trigonometry, algebra, graphing, plus a few on calculus etc.) interactively.
Explorelearning Math Gizmos
Math and science interactive "gizmos" that are accompanied with an exploration guide and assessment question. By subscription, but they have a free 30-day trial.
Mathematics Illuminated is a 13-part, integrated-media resource created for adult learners and high school teachers. The series covers the broad scope of human knowledge through the study of mathematics and its relevance in the world today. It reaches beyond formulas and computations to explore the math of patterns, symmetry, relationships, multiple dimensions, and more, all the while uncovering the secrets and hidden delights of the ever-evolving world of mathematics. This course us videos, online texts, web interactive activities, and group activities.
Mathwright Library and Cafe
The Mathwright Library (by subscription) is a growing collection of interactive, electronic mathematics and science WorkBooks and Microworlds for high school and college students. The Math Cafe has some of these WorkBooks as free demonstrations. They are multi-page dynamic mathematical explorations that put you in the drivers seat, let you ask your own questions, and let you learn at your own pace as they unfold their stories to you. For their WorkBooks you will need to download a free player. Microworlds requires Active-X enabled browser (Microsoft Internet Explorer 4.0 or higher).