Before graduating high school in 2018, I built and flew a rocket for my (junior) level 1 high-power NAR certification. I used a Crayon rocket kit from discountrocketry.com.
Many thanks to Stu Cobb for his excellent videography!
At this time, I don't remember which exact motor I used, but I know it was a disposable H motor using the "redline" propellant sold by Aerotech. The flight was a success, earning me my Junior L1 certification!