I went to Horizon in the 5th grade and my mother taught 4th grade a few years ago.
The school was doing poorly, discipline wise, when it first began. After Mr. Berry (the principal and founder) realized that the school would gain more students if they expelled or took care of misbehaving students, the school began to take off. It went from only high school (with about 42 students) to K-12 with hundreds of students. The education is good Christian education. The teachers are nice. Mr. Berry is an excellent principal. Horizon is one of the better schools in Cumming.