URL:
http://www.khanacademy.org/ KahnAcademy has videos of thousands of lessons  mostly math.
Use the Download
button to avoid going through Youtube. 

URL: http://www.khanacademy.org/login?k&continue=/postlogin%3Fcontinue%3Dhttp%253A//www.khanacademy.org/&direct=1 KahnAcademy  Login allows teachers to set up lesson paths for students. Progress is tracked.


URL:
http://mathtrain.tv/ Mathtrain.tv "is a free, educational "kids teaching kids" project from Mr. Marcos & his Students at Lincoln Middle School in Santa Monica, CA."


URL:
https://www.matific.com
Matific "takes a
unique approach to teaching K to math using handson and interactive
minigames, called episodes. These immersive bitesized apps for tables and
personal computers are based on a modular and progressive spiral learning
system. Our extensive portfolio of hundreds of activities and worksheets are
entirely curriculumdriven. The richly indexed activities and worksheets
were developed to easily facilitate mapping onto popular textbooks and
standard math curricula." 

URL:
http://www.mathplayground.com/index.html Math Playground offers grade level math activities, word problems, logic activities, common core activities, games, and more for grades 16.


URL:
http://www.corealgebra.com/default.htm Core Algebra 1 "synthesizes guided practice worksheets with video instruction and multilevel online follow up exams. We present the core concepts of Algebra 1 in a medium that today's student is familiar with."


URL:
http://www.glencoe.com/sites/common_assets/mathematics/ebook_assets/vmf/VMFInterface.html
Virtual Manipulatives
offers pre K  8th grade manipulatives in an exploration/interactive format. 

URL:
https://www.xtramath.org/
XtraMath
is an online math facts practice program. Student progress is monitored.


URL: http://www.mrnussbaum.com/mathcode.htm Mr. Nussbaum provides many interactive activities for practicing math skills.


URL: http://www.sheppardsoftware.com/math.htm Sheppard Software provides many activities for practicing math skills.


URL:
http://www.kidsnumbers.com/
KidsNumbers provides many activities for practicing math skills. 

URL: http://www.mhschool.com/math/mathtoolchest/mtc_online/ Math Tool Chest provides many interactive activities for math skills.


URL:
http://www.amathsdictionaryforkids.com/ A Maths Dictionary is an animated interactive dictionary which explains over 400 common mathematical terms in simple language. 

URL:
http://resources.oswego.org/games/mathmagician/cathymath.html Math Magician Games allows students to practice addition, subtraction, multiplication and division facts in timed exercises. Certificates can be printed


URL:
www.aplusmath.com A+Math "was developed to help students improve their math skills interactively." A "homework helper" is included. 

URL:
http://www.nces.ed.gov/nceskids/createagraph/ Create a Graph allows you to create your own graph!


URL:
http://www.mathcats.com/ Math Cats invites you to "join the Math Cats in a land of creative, openended math Explorations!" There are games, crafts, story problems and much more at this site. 

AAA Math has practice activities for students K8 in a variety of math topics. 

URL:
www.multiplication.com Multiplication.com shares many activities to make learning your multiplication tables fun. 

URL:
http://www.mhschool.com/math/2002/student/index.html Macmillan/McGrawHill Math offer many games, puzzles and math links for students in grades K  4. 

URL:
http://mathforum.org Math Forum presents math resources by subject for K12, College and Advanced Math. Problems of the week and links to worldwide math resources can be found here. 

URL:
http://www.mathgoodies.com/ Mrs. Glosser's Math Goodies "is a free math help site featuring interactive lessons, homework help, worksheets and forums! We have over 400 pages of activities for students, teachers and parents." 

URL:
http://www.math.com/homeworkhelp/PreAlgebra.html Math.com (PreAlgebra) offers a variety of activities presented in small steps. Unit quizzes are also available. (Other math topics are also on this site.) 

URL:
http://www.millsberry.com/gamepages/flashgame_ctp.phtml?game_id=80 Countdown is a fun math game from Millsberry. You don't need to become a member to play. Just click on the spaceship to start. Thank you, Jacob. A., for finding this fun site!


URL:
http://www.coolmath.com/ Coolmath offers many games for all ages. (I hear that younger students enjoy this site too!)


URL: http://ejad.best.vwh.net/java/patterns/patterns_j.shtml 

URL:
http://matti.usu.edu/nlvm/nav/frames_asid_175_g_1_t_1.html Virtual Manipulatives is another interactive site for pattern blocks directly from the National Science Foundation site below. 

URL:
http://studyjams.scholastic.com "Study Jams is a webbased service that teaches kids math and science topics through videos karaoke, math tutorials and more. the interactive content entertains and engages kids while making math and science fun and relevant." There is a free trial and then a cost after that. The focus is on grades 36 standards. 

URL:
http://nlvm.usu.edu/
Interactive Mathematics is a National Science Foundation library of interactive, webbased virtual manipulatives for K8 mathematics instruction. Be sure to see the "site guide" to find out if your computer is able to view the activities. 