Arithmetic
Reader Lists. Arranged by topic, this is a compilation of literature (stories vs. textbook) that teach math.
Dad’s Worksheets – Worksheets Answer keys are also available.
Math Lair – Divisibility Tests. Shortcuts to help make division easier. Some of them are simple (“A number is divisible by 5 if its last digit is either a 5 or a zero.”) and some are more complex. Might be helpful for those learning division.
That’s a Fact – practice addition, subtraction, multiplication and division
Mathematics Enhancement Programme. We use this curriculum and I am very impressed with it. Students learn not only the “how” of math, but the “why” of math. It’s a British curriculum so you will have to supplement with US standard weights & measures, etc. Downloading requires a password, but simply follow the instructions to request a password and let them know you are a homeschooler; I had no problem getting a password.