Math. Do you like it? Do you understand it? Have you perused the 'state standards' for math lately? 'They' want students to be doing Algebra I (more difficult than any Algebra I that I did as a high school freshman) as eighth graders at the latest. Are you spending lots of money and time at tutoring centers such as Kumon? Homeschooler or not, if you have children from about third grade and up or if your math skills are non-existent, use your google or facebook to log on to Khan Academy. It is free- I think with some of Bill Gates' money.
I can see this being a saving grace for a big family with lots of different levels. And I never studied past Algebra II, but I have a feeling my children will go beyond that- so I can use this to study for myself and/or make sure that they are getting supplemental help in math. Knowledge is power!