This study aimed to develop a scale to determine students' perceptions of teacher involvement in mathematics homework assignments. An item pool (n = 30) was generated based on a literature review. Based on expert feedback, the number of items was reduced to 21 scored on a 5-point Likert-type scale. A draft named the "Scale of Teacher Involvement in Mathematics Homework Assignments (STIMHA)" was developed after the items were reviewed by a linguist. A pilot study was conducted with six middle school students to check for comprehensibility. The items were revised and finalized based on their feedback. The main study sample consisted of 751 middle school students from four schools in Demirci/Manisa in Turkey during the 2017-2018 academic year. Data were analyzed using the Statistical Package for Social Sciences (SPSS 24.0) and Analysis of Moment Structures (AMOS 21.0). Validity and reliability were established.