Developing data literacy skills at a young age can dramatically improve workforce preparedness. However, not all middle schoolers are being taught data literacy. Through our user research, we learned that students are much more likely to learn these important skills if the data being used is directly related to their daily lives. Therefore, our team created Data Diary, a tool that helps build data visualizations that use data that is directly based on student-provided data. Data Diary teaches data literacy by gamifying the process of data collection and data analysis to increase student interest and participation.