<![CDATA[This research aims are to develop an integrated thematic primary school themed test assessment and to know the difficulty level, differentiation, distractor, validity and reliability. The research population were V grade students of Primary School, Pringsewu District, SDN 1 Banyuwangi, SDN Wayakrui and SDN 8 Bandungbaru. This research used Research and Developmet method with the steps according to Borg Gall. The data collection tool used questionnaires and tests. Data analysis techniques by expert validation and test instruments are analyzed with the validity, reliability, difficulty, differentiation, and distractor. The validation assessment results, material and linguistic experts on question instruments are developed very well, and are worthy of use. The results of large-scale test of product development and usage test shows that the instrument result has good quality that can be used to measure students' cognitive abilitiesTujuan penelitian mengembangkan asesmen tes tulis berbasis tematik terpadu Sekolah Dasar dan mengetahui tingkat kesukaran, daya beda, analisis pengecoh, validitas dan reliabilitas. Populasi penelitian siswa kelas V SD di Kabupaten Pringsewu, sampel penelitian SDN 1 Banyuwangi, SDN Wayakrui dan SDN 8 Bandungbaru. Penelitian menggunakan metode Research and Developmet dengan tahap menurut Borg Gall. Alat pengumpulan data menggunakan angket dan tes. Teknik analisis data dengan validasi ahli dan instrumen tes yang dianalisis dengan validitas butir soal, reliabilitas, tingkat kesukaran, daya beda, dan pengecoh. Hasil validasi ahli asesmen, materi dan bahasa terhadap instrumen soal yang dikembangkan sangat baik, dan layak digunakan. Hasil ujicoba skala besar produk hasil pengembangan dan uji pemakaian menunjukan hasil instrumen soal mempunyai kualitas baik, dapat digunakan untuk mengukur kognitif siswa.Kata kunci: asesmen, tes tulis, tematik terpadu]]>
