Pedagogical Content Knowledge Analysis of Mathematics Teachers in Developing Lesson Plans on Ratio Topic

In preparing a Lesson Plan, mathematics teacher should pay attention to pedagogical principles, including general and mathematical pedagogy. Teacher knowledge related these two pedagogies is called Pedagogical Content Knowledge (PCK). This study aims analyze the PCK of at junior high school in Kebumen when lesson plans carrying out learning activities on Ratio Topics. used qualitative research method with case design. The teacher’s analyzed this was divided into parts: knowledge. results showed teachers' more complete than compiling plans. Likewise, pedagogy, teacher's pedagogy education better also indicates mismatch between compiled by he carried out. Therefore, plans, teachers are advised pour all content that they have so entire process can be optimally.