Abstrak: Analisis situasi pada sekolah mitra yaitu SMAN 1 Tambang Kabupaten Kampar Provinsi Riau menunjukkan para siswa masih berada pada kategori Lower Order Thinking Skills (LOTS). Masih banyak guru menggunakan instrumen evaluasi berupa soal yang hanya ada di buku paket dan tingkatan soal C1-C3. Kegiatan pengabdian ini bertujuan untuk meningkatkan pengetahuan dan keterampilan guru dalam menyusun instrumen evaluasi berbasis HOTS. Mitra pada kegiatan pengabdian ini yaitu SMAN 1 Tambang Kabupaten Kampar Provinsi Riau, yang terdiri dari 34 orang guru. Kegiatan terdiri dari (1) Persiapan; (2) Pelaksanaan; dan (3) Evaluasi. Untuk mengukur ketercapaian tujuan kegiatan yang dilakukan digunakan instrumen soal pretest dan posttest. Berdasarkan hasil yang diperoleh bahwa terjadi peningkatan nilai rerata pretest yang awalnya 40 meningkat menjadi 83. Seluruh peserta (100%) memperoleh peningkatan skor nilai pretest-posstest. Dapat disimpulkan bahwa kegiatan pelatihan dapat meningkatkan kemampuan dan keterampilan guru dalam menyusun soal berbasis HOTS.Abstract: Analysis of the situation at the partner school, SMAN 1 Tambang, Kampar Regency, Riau Province, showed that the students were still in the Lower Order Thinking Skills (LOTS) category. There are still many teachers who use evaluation instruments in the form of questions that only exist in textbooks and level questions C1-C3. This service activity aims to improve the knowledge and skills of teachers in preparing HOTS-based evaluation instruments. Partners in this service activity are SMAN 1 Tambang, Kampar Regency, Riau Province, which consists of 34 teachers. Activities consist of (1) Preparation; (2) Implementation; and (3) Evaluation. To measure the achievement of the objectives of the activities carried out, pretest and posttest questions were used. Based on the results obtained that there was an increase in the mean value of the pretest which was initially 40 increased to 83. All participants (100%) obtained an increase in the score of pretest-posttest scores. It can be concluded that training activities can improve the ability and skills of teachers in preparing HOTS-based questions.
                        
                        
                        
                        
                            
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