There are some instructional tools that teachers must prepare before teaching such as students' worksheet and lesson plan. They are very necessary or the teaching and learning process. However, a scientific-based approach has not been implemented for grade 7th junior high school students in craft lesson. The purpose of this research is to develop valid, practical, and effective worksheet and lesson plan using the scientific-based approach in learning craft for grade 7th junior high school students to improve the learning process that is aligned with the 2013 curriculum. This research is a research and development that refers to 4-D model. The validity of students' worksheet and lesson plan are evaluated by experts judgment, their practicality is evaluated from the teachers' and students' respond, while their effectiveness is reviewed from the students' learning outcomes. Data collection techniques, as well as instruments used, are interview guidelines, observation sheet, validation sheets, questionnaires, and test. The results show that the developed students' worksheet and lesson plan are valid in terms of approach, content, form, language, graphic skills, components, formulation, and language used. They are also practical in terms of ease of use, usefulness, and time allocation. Then, they are effective because the students' learning outcome is increased to 87.18%. They pass the minimum passing grade. Thus, the developed students' worksheet and lesson plan have met valid, practical, and effective criteria.