Which rank is indicated by three chevrons and a star?

The rank indicated by three chevrons and a star is indeed Cadet Sergeant Major. This rank is typically represented by three chevrons pointing upward and a star positioned above them, symbolizing a leadership role with significant responsibilities within the cadet corps.

This rank reflects a higher level of achievement and leadership, recognizing the cadet's commitment and capability to mentor junior cadets, manage tasks, and assist instructors. Cadet Sergeants Major often play a vital role in the organization by acting as a bridge between the instructors and cadets, being responsible for maintaining discipline and promoting a positive learning environment.

The other ranks do not feature this specific insignia, which helps differentiate between levels of authority and responsibility within the JROTC program.