October 22, 2026 — Pebblebrook High School’s Class of 2026 has academic progress to recognize. Students improved their average ACT composite score compared with the previous year. 

Pebblebrook students earned an average ACT composite score of 18.4 out of 36 possible points. The results were part of Cobb Schools’ districtwide average composite score of 23.0, which exceeded the Georgia average of 20.9 and the national average of 19.2. 

The school’s average increased from 17.9 in 2025 to 18.4 in 2026, a gain of 0.5 points. This marks a second consecutive year of improvement. ACT participation also increased, from 47 students in 2025 to 59 in 2026. 

The school’s ACT performance provides another opportunity to highlight student preparation for college, careers, and life after graduation. 

The school's success follows another strong SAT performance, where Pebblebrook students increased their average score by 25 points. That success extends beyond test scores, with the school's graduation rate rising to 79.8%, helping Cobb Schools achieve a record-breaking districtwide rate of 90.9%.

Together, these achievements reflect the commitment of Pebblebrook and Cobb Schools to preparing students for success in the classroom and beyond.