Data-based decision making can lead to increased student learning. The desired effects of increased student learning can only be realized if data-based decision making is implemented successfully. Therefore, a systematic literature review was conducted to identify prerequisites of such successful implementation. Furthermore, focus group meetings were conducted with experts and practitioners to verify and illustrate the findings from the review. Several prerequisites of successful data use in the classroom that are supported by a substantial evidence base were identified, including teacher collaboration around the use of data, data literacy, and leadership.