There are many fun websites to assist you with practicing skills and current standards. Check out some links below! GCF and LCM: http://www.sheppardsoftware.com/mathgames/fractions/GreatestCommonFactor.htm http://www.coolmath-games.com/0-math-lines-xfactor/index.html http://www.sheppardsoftware.com/mathgames/multiple/multiple_frenzy.htm http://www.mathplayground.com/multiples.html Khan Academy https://www.khanacademy.org Algebraic Expressions: http://www.math-play.com/Algebraic-Expressions-Millionaire/algebraichttp://www.quia.com/jg/1120841.html-expressions-millionaire.html http://www.fun4thebrain.com/beyondfacts/lcmsnowball.html If you want to study for the standards, check out Engage New York. Here's the link: https://www.engageny.org/ccss-library/?f[0]=im_field_grade%3A13531&f[1]=im_field_ccls_math%3A10076&js=1