How can I find the students that are having difficulties in a certain subject

The first way is to go into snapshot reports, within the reports submenu. Following this, choose the class and time period for the given subject. Click on the Green, Yellow and Red bar, on the orange or red part of it. This will filter the list of students and activities that were completed with a low number of stars.

The second is to go into the curriculum submenu under the reports page. Choose your class and find the curriculum subject you want the report on. You will see the class average for the subject aswell as how each student did. Clicking the small arrow will open the list of activities that the class performed and how each one did.

Please watch the video below for further help