Competition Resources

Art of Problem solving is an amazing resource for all sorts of Math competitions and material; it has AMC, Mathcounts, and more. I highly reccomend this website. Everything you need to become an elite mathematician is available here, MAKE AN ACCOUNT AND GET PRACTICING!!

AMC Trivial is a question generator for AMC-style questions. With the Difficulty sliders and the training modes, this resource is a great tool for all skill levels!

One of the many great resources available on AOPS.com; For the Win is a head to head game mode that allows you to play online with students around the world. You compete to earn points by answering questions from old Math competitions (Mathcounts, Amc, etc.), whoever answers correctly first wins more points!

Another great AOPS resource: Alcumus helps you learn from a variety of interesting Math topics at a variety of difficulties. Everything from Pre-algebra to pre calculus to Number theory is available.