Tinker Cad is an awesome software a lot of our students are using. In our Media Center we have a 3d Printer and when we get to the Geometry section with the kiddos, I plan to incorporate this software for them to design their own 3d Shape.
Kahoot is very beneficial for every student. We incorporate this in our classroom often as a study guide/quiz preview option. Your child also has the ability to create their own Kahoot to create their own study guide.
Khan Academy is great for any student Kindergaten and up, especially for Math. If your child get stuck on a problem at home, Khan Academy provides free tutorials for many of the issues that might come up. It gives you an option to select by grade level, and goes along with GA Standards.