IXL, a significant provider of supplemental education for grades K–12, advertises its goods and services on ixl.com. IXL is in competition with leading providers of K–12 supplemental education materials, including KiwiCo, Pearson, and ABCmouse. In the fiercely competitive online k–12 supplemental education market, IXL offers mid-range purchase size products on both its own website and partner websites.