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Mathplanet
http://www.mathplanet.com/
The aim of Mathplanet.com is to spread mathematical knowledge all over the world, completely free of charge. We offers courses in high school math such as Pre-algebra, Algebra 1, Algebra 2 and Geometry. We have also prepared practice tests for the SAT and ACT. The educational material is focused on US high school math. However, since math is the same all over the world, we welcome everybody to study math with us, for free.
Mathtutor
https://mathtutor.web.cmu.edu/
Mathtutor is a free website designed to help 6th, 7th and 8th grade students learn math
Math | Khan Academy
https://www.khanacademy.org/math
Watch videos and practice your skills for almost any math subject.
IXL | Math and Language Arts
https://www.ixl.com/
IXL is an immersive K-12 learning experience that provides comprehensive, standards-aligned content for math, language arts, science, and social studies.
GFC LearnFree.Org
http://www.gcflearnfree.org/googledriveanddocs/
This free Google Drive tutorial will teach you how to use this cloud-based program to create and save documents, spreadsheets, and more.
XtraMath is a free program that helps students master addition, subtraction, multiplication, and division facts.
https://xtramath.org/#/home/index