Affiliate Disclosure

Affiliate Link Disclosure: MathDiscovery.com invests resources to create free, quality educational materials to its users. In order to pay for these services and to generate a profit, we will occasionally link  to products through affiliate agreements (e.g. Amazon.com). If you click on one of the affiliate links and make a purchase, we earn a small commission. Keep in mind that we link to these companies and their products because of their quality and educational value and of course, you are never obligated to buy anything. An example of an affiliate link might be in one of our blog articles where we link to a set of flash cards on Amazon.com for example.