Identifying questions which require databases to answer. These lessons may not be used for professional development without purchase of a site license. Databases are good tools to weigh the importance of variables . It is very important to understand what variables are.
Variables usually interact with each other.
A high school runner who wants to optimize performance may keep a chart showing the relationship between race times and key variables such as sleep , diet , mood , number of miles run per week and types of workouts performed each day. We build a database to test which variable has the most powerful effect on the one we hope to change or improve. Explain your choice in your word processor. This is a bit like posing a hypothesis. If you give a student a good breakfast before a test, then . . .