penelitian ini bertujuan untuk mendeskripsikan pelaksanaan pembelajaran flipped classroom pada mata kuliah geometri transformasi pada porgram studi pendidikan matematika FKIP ULM. Data penelitian merupakan hasil survei pada kelas yang melaksanakan flipped classrom menggunakan instrumen kerangka Williams and Eggert (2002) dan Lew et al. (2016) , kemudian data dianalisis menggunakan skala likert dan kategorisasi dan prosentasi. Kesimpulan (1) mahasiswa setuju mengikuti perkuliahan selalu memperhatikan penjelasan dosen, (2) Pemrosesan kognitif pada umumnya dapat berlangsung dengan baik akan tetapi mahasiswa masih ragu-ragu dapat memikirkan materi perkuliahan, (3) Mahasiswa setuju bahwa mencatat materi perkuliahan penting, di samping juga mahasiswa memberikan garis bawah atau warna dan memberi komentar untuk dipelajari pada persiapan ujian tengah semester atau ujian akhir semester, (4) Mahasiswa meninjau pemrosesan setelah kelas selesai dengan cara melengkapi catatan, memberikan komentar pada buku catatan, akan tetapi mahasiswa masih belum membuat flashcard untuk belajar. Kata kunci: Flipped Classroom, geometri Transformasi, kerangka Williams and Eggert Abstract: Contents are typed with Arial Narrow font, size 11, Justify, italic, and single spaces. Abstract contains a summary of research objectives, research methods, and results. Abstract consists of a maximum of 200 words. Abstract: This study aims to describe the implementation of flipped classroom learning in the geometry transformation course in the Mathematics Education Study Program FKIP ULM. The research data is the result of surveys in classes that carry out flipped classes using the Williams and Eggert (2002) and Lew et al. (2016), then the data were analyzed using a Likert scale and categorization and percentage. Conclusions (1) students agree to attend lectures always pay attention to the lecturer's explanation, (2) Cognitive processing in general can go well but students are still unsure about being able to think about lecture material, (3) Students agree that taking notes on lecture material is important, besides students provide underlines or colors and provide comments to study in preparation for midterm or final semester exams, (4) Students review processing after class is over by completing notes, commenting on notebooks, but students still haven't made flashcards for study . Keywords: Flipped Classroom, Transformation geometry, Williams and Eggert framework