Khan Academy is one of the best resources for anyone to find helpful videos on any topic in Math. It also has practice problems for every topic to strengthen your understanding. I highly recommend this website for anyone (parents & students). Students who are in my 8 Explore class can use this link at home to meet their weekly quota for Khan Missions.
This is a simple to use, online calculator if students do not have one at home. Calculators are not used inside of the classroom, but can be a great tool at home to check student's answers to homework problems if they are unsure.