If your account has been set up as a parent account, you should see a box on the right titled "MY STUDENTS". Clicking on a child's name, will bring you to that child's profile page.
The courses listed on the student's profile page are links to information on the student's activity in those courses. Select a course you'd like to check on from the profile page. Then, on the course profile page for the student, you can select an Activity Report from the left menu.
If you have any questions on student reports, please ask.