1. Bogomolny, M.: The Role of Example-Generation Tasks In Students’ Understanding of Algebra, Simon Fraser University, Canada (2006)
2. Stanford High School, Linear Algebra,
http://ohs.stanford.edu/syllabi/syllabus_UM51A.pdf
3. Stuyvesant High School, Math Courses,
http://stuy.enschool.org/apps/pages/index.jsp?uREC_ID=127571&type=d&termREC_ID=&pREC_ID=253244
4. Pukekohe High School, Linear Algebra,
http://www.pukekohehigh.school.nz/WebSpace/1473
5. National Federation of the Blind: Statistical Facts about Blindness in the US in 2011 (2011),
https://nfb.org/factsaboutblindnessintheus