Final answer:
The DA Form for initial and quarterly NCO counseling and evaluations is the DA Form 2166-9 series, or Noncommissioned Officer Evaluation Report (NCOER).
Step-by-step explanation:
The DA Form that is used to document initial and quarterly NCO counseling, professional development, and prepare the final evaluation is DA Form 2166-9 series, which is also known as the Noncommissioned Officer Evaluation Report (NCOER). This form serves as a guide for the counseling sessions throughout the evaluation period and provides recorded documentation of a noncommissioned officer’s performance and potential. Completing this form properly is essential for the professional development of NCOs and plays a crucial role in their career advancement within the military.