Looking for an instrument (brief) to measure critical health literacy among high school students. Not interested in basic/functional health literacy, such as "do you understand the instructions on your medication." Instead, seeking a way to measure communicative and critical health literacy. WHO definition of interest: "Health literacy represents the cognitive and social skills which determine the motivation and ability of individuals to gain access to, understand and use information in ways which promote and maintain good health" (Nutbeam, 1998).