If your school tracks GPA, use the "Grades" page to check yours. Each grading period has its own GPA. If you want to improve your GPA, you'll have to improve your course grades. Using the example grades below, we can determine that this student should focus on the lowest grades for Q3 (since Q1 and Q2 are already over). This means improving grades for Algebra I, English II, and Speech II, since these are the lowest scores.
One approach is to simply ask your teachers how you can improve your lowest grades. If you want to do a bit more research though, you can click on your low grades to get more detail, or visit the "Progress Reports" page. Either way, you'll be able to identify which assessments are dragging your score down the most. Learn more here.