ABSTRACTThis activity aims to build character in developing the potential of students who have intelligence, skills, and personality. The mentoring method is carried out through several stages of activities, including: preparation, implementation, evaluation and reflection, as well as follow-up. Thus, the mentoring program that has been carried out can improve teacher competence in the preparation of authentic character-based assessment instruments in the realm of skills. Keywords: Authentic Assessment, Character ABSTRAK Kegiatan ini bertujuan untuk pembentukan karakter dalam mengembangkan potensi peserta didik yang memiliki kecerdasan, keterampilan, dan kepribadian. Metode pendampingan dilaksanakan melalui beberapa tahap kegiatan, antara lain: persiapan, pelaksanaan, evaluasi dan refleksi, serta tindak lanjut. Dengan demikian, program pendampingan yang telah dilakukan dapat meningkatkan kompetensi guru dalam penyusunan instrument penilaian autentik berbasis karakter pada ranah keterampilan. Kata Kunci: Penilaian Autentik, Karakter