The Best Online High School in Texas for Grades 9–12

Texas high school students have access to a wide range of accredited online programs — from tuition-free public charter schools to structured private programs with live instruction and AP coursework. Whether a student is preparing for a competitive university or needs a more flexible path to graduation, finding the best Online high school in Texas starts with comparing accreditation, curriculum quality, and the level of support each program provides. This guide reviews five top options.

TL;DR

• Legacy Online School: WASC-accredited private K–12 school with live classes, AP courses, flexible pacing, and college counseling from $149/month.
• Texas Connections Academy:  Tuition-free Cognia-accredited public online high school backed by Pearson; AP and honors courses; Learning Coach model.
• TTU K–12:  Texas Tech University’s Cognia-, TEA-, and NCAA-accredited online high school; year-round enrollment; AP and credit-by-exam options.
• iSchool Virtual Academy:  Free TEA-accredited Texas public online school for grades 3–12 with dual credit options and flexible scheduling.
• Forest Trail Academy:  Cognia-accredited private K–12 school based in Texas; serving students since 2007 with flexible scheduling and certified teachers.

Legacy Online School – Top Accredited Private Online High School in Texas

Legacy Online School is a fully accredited private K–12 program and one of the leading Online high school in Texas options for Texas families seeking structured, high-quality virtual education. Accredited by WASC, Legacy offers live group classes with certified teachers, one-on-one tutoring, and fully self-paced learning — all within a single enrollment. The high school curriculum includes AP courses developed with the College Board, honors classes, and STEM programs.

Graduates receive a U.S.-accredited diploma recognized by colleges and universities nationwide. College and career counseling is integrated into the high school program. Tuition starts at $149/month, and virtual clubs and extracurricular activities are included.

Texas Connections Academy – Free Public Online High School

Texas Connections Academy is a tuition-free public online school for Texas students in grades 3–12. Accredited by Cognia and backed by Pearson, it offers a state-aligned curriculum with AP and honors courses, dual enrollment options, and certified Texas teachers. Parents serve as Learning Coaches, staying actively involved in daily learning.

The school provides strong academic and counseling support alongside more than 20 virtual clubs. It is fully funded by state tax dollars, with no tuition cost for eligible Texas residents.

TTU K–12 – University-Affiliated Online High School in Texas

TTU K-12, affiliated with Texas Tech University, is approved by the Texas Education Agency (TEA) and accredited by Cognia. Its high school program covers all required core subjects, AP courses, and electives, taught by 75+ Texas-certified teachers. The program is NCAA-approved, making it a practical option for student-athletes.

Enrollment is open year-round with no application deadlines, and students can enroll full-time or take individual courses. Credit-by-exam options allow academically advanced students to accelerate progress.

iSchool Virtual Academy – Free Flexible Texas Online High School

iSchool Virtual Academy is a free, TEA-accredited public online school for Texas students in grades 3–12. Its high school program offers core academics alongside dual credit options and career-focused pathways, delivered by Texas-certified teachers.

Students can study at flexible times — mornings, evenings, or weekends — while still meeting structured deadlines. Chromebook rentals are available for eligible families.

Forest Trail Academy – Established Private Online High School in Texas

Forest Trail Academy is a Cognia-accredited private K–12 online school that has been serving Texas students since 2007. All instruction is delivered by certified and licensed teachers through a flexible platform. The school is well-suited for student-athletes, performers, and students with non-traditional schedules.

Forest Trail provides personalized academic support and a pathway to a U.S.-recognized high school diploma. Enrollment is open year-round with over 10,000 students served.

Comparing Online High School Programs in Texas

 Getting Started with Online High School in Texas

Texas students have strong accredited options for completing high school online. Legacy Online School leads the private category with live instruction, AP courses, flexible pacing, and a WASC-recognized diploma at an accessible price. Texas Connections Academy and TTU K-12 are the strongest free public options, both with AP and dual enrollment.  iSchool Virtual Academy is the best free option for students who need maximum daily scheduling flexibility. Forest Trail is a reliable private alternative for Texas students who need year-round flexible enrollment. Verify accreditation and confirm credit transfer policies before enrolling. Explore the available online high school in Texas programs and find the one that best supports your student’s goals.