CTCMath vs Discovery K12

CTCMath is a hybrid math curriculum for kindergarten through Grade 12, with material ranging from early grades through Algebra 1, Geometry, Algebra II, Pre-Calculus, and Calculus. It pairs video instruction with interactive practice and optional printable worksheets. The site lists more than 1,400 tutorials, generally 4–9 minutes long, with synchronized audio and animation. Practice questions and worksheets are automatically marked and recorded; printable worked solutions show the steps behind answers. Progress reports include lesson results, scores, pass dates, and time spent, while standard and comprehensive placement tests cover each topic in grades K–8. Lesson plans, assessments, and parent guidance are included. The service runs on web, iOS, and Android. Paid memberships are $39.90 a month for one student or $59.90 a month for more than one student. CTCMath presents the curriculum for parents, teachers, and homeschoolers.

Discovery K12 has no write-up on Specifiction yet; its figures are above.