Here are a few links I think every homeschooler should have bookmarked or pinned (many are great for non-homeschoolers as well!).
Xtramath.com is a website that provides kids with an opportunity to practice math facts while avoiding those pesky (and boring) flashcards. Kids are evaluated in the four operations and then they start the program at a level customized for them. The best part: It's FREE!
Need help explaining unit-multipliers? pythagorean theorum? free radical reactions? Chinese inflation? the Electoral College? Check out KahnAcademy.org where you and your child can watch a video on virtually anything.
This is for my Mississippi friends... RiseupMS.com is a website dedicated to college bound students in the state of Mississippi. The goal is to help with issues such as high school transcripts, choosing a college, financial aid, and more. If your in the state of MS and have a high schooler or a soon-to-be high schooler, you'll definitely want this in your arsenal of college-ready materials.
HSLDA.org is an organization created to protect the rights of homeschoolers in the United States. Member benefits include, among other things, legal representation in the event that your rights as a homeschooler are ever questioned. If the yearly membership fee is too much for your family to handle at once, HSLDA offers a convenient monthly payment plan.
If you have any valuable links to add to this list please feel free to leave them in the comments section! I'd love to have more great links to add to my collection!