The teacher acts as a mover, motivator, and mentor in student learning activities. Teachers also act as mentors to other teachers and agents of transformation in the education ecosystem in schools. This study aims to describe the pattern of teacher learning planning in shaping students' Self-Regulated Learning (SRL) in learning mathematics. This lesson plan was carried out by a mathematics teacher to class VII students in Junior High School. There are stages of thinking, performance, and reflection based on in-depth interviews with mathematics teachers about lesson planning. The beginning of the thinking stage includes learning initiatives, diagnosing learning needs, setting learning goals, and viewing difficulties as challenges. The performance stage begins with selecting and determining learning strategies, utilizing media and facilities, and looking for relevant learning resources. The reflection stage is carried out by monitoring, regulating, and controlling learning as well as evaluating the learning process and results. The right lesson planning from the teacher makes triggers for students to do SRL in learning mathematics so that students can learn independently to realize the achievement of learning mathematics outcomes.