This Research was purpose to develop learning in form of handout, analized the benefit, the easy, the advisability, and the effectiveness of the teching to foster the students learning outcomes. The research development which referred to Borg and Gall theory. The population of this research included 255 students of grade IV in Radin Intan II area, Way Tuba, Way Kanan. The samples of this research were the IVth grade students of SD N 01 Suma Mukti as control class (before) and also as experiment class (after) used the learning materials. The researcher gave questionnaire to get data about the benefit, the ease, and the advisability of the teaching learning materials. And, the researcher also gave test to assess the effectiveness of the materials by using t-test. The result, namely: materialized the learning materials based on discovery learning; and have fully benefit, ease, and advisability which shown by the teachers positive responses; the learning materials are effective, it can be seen from the students learning outcomes. Penelitian ini bertujuan mengembangakan bajan ajar berupa handout, menganalisis kemanfaatan, kemudahan dan kelayakan serta efektivitas bahan ajar untuk meningkatkan hasil belajar. Jenis penelitian Pengembangan ini merujuk pada teori Borg and Gall. Populasi penelitian ini adalah 255 siswa kelas IV SD dabin Raden Intan II, Kecamatan Way Tuba Kabupaten Way Kanan. Sampel dalam penelitian ini adalah siswa kelas IV SDN 01 Suma Mukti sebagai kelas kontrol (sebelum) sekaligus kelas eksperimen (sesudah) menggunakan bahan ajar. Data diperoleh melalui lembar angket kemanfaatan, kemudahan dan kelayakan, serta soal tes. Uji efektifitas penelitian dengan menggunakan uji t. Hasil yang diperoleh yaitu: terwujudnya bahan ajar berbasis discovery learning; memiliki kemanfaatan, kemudahan dan kelayakan dilihat dari respon guru yang positif; dan bahan ajar ini dinyatakan efektif meningkatan hasil belajar.Kata kunci: bahan ajar, discovery learning, hasil belajar siswa.