Camira raised her hand tentatively. Ugh. This was her worst subject. "Isn't it by belts, sir? The different colors signify different levels of advancement in the following order:White, Advanced White, Junior Yellow, Advanced Junior Yellow, Yellow, Advanced Yellow, Junior Green ,Advanced Junior Green, Green, Advanced Green, Advanced Junior Blue, Blue, Advanced Blue Junior Red, Advanced Junior Red, Red, Advanced Red I, Advanced Red II, and Black"