The biography honors the "inner side" of being a teacher. Fifty tried-and-tested worksheets encourage reflection on the substantial demands of daily professional practice. Central ideas from leading educators are related to personal life experiences in such a way that actionable insights for concrete teaching activities can be gained. This working method is based on scientific concepts of biographical self-reflection and biographical learning. The biography can be used independently of school type, grade level, or subject areas, both autonomously and within an institutional framework, and can sustainably promote personal professional development.