In color theory, a purple is defined as any non-spectral color between violet and red (excluding violet and red themselves). The spectral colors violet and indigo are not purples according to color theory, but they are purples according to common English usage since they are between red and blue.
Apex Learning was started in 1997 by Microsoft co-founder Paul Allen on the idea that online courses and test prep, which were already succeeding in higher education, could be applied to K-12.
About SABIS. Established in 1985 in Minnesota, SABISÂ® Educational Systems, Inc. (SES) owns the exclusive rights in the Americas and Europe to the dynamic SABISÂ® Educational System. Responsible for developing the SABISÂ® School Network in these areas, SES has established a range of schools in the private and public charter school sectors.