KPI (Key Performance Indicator) is used to measure and track the student's performance.
With this feature, every organization can have a unique way of measuring their student's performance based on custom indicators.
Add an existing category to a class:
To add an existing KPI to a class, navigate to My Classes > click on the group class to which you wish the add KPI.
You will now be directed to a page that displays more information about the group class. Navigate down to the Enrollment section and click on the add icon (+) to add a student to the group class, shown below.
In the below picture, the user is adding KPI for a class for Flute Intermediate.

After clicking the add icon (+), you will be redirected to a page where you can provide further details for enrollment. On this page, you will see sections such as Student List, Feedback Category, Invoicing Schedule, and more.
To add student enrollments to the group class, click on the dropdown menu to add an existing student or the add icon (+) to enroll a student by creating a new student record.
For example, the below image shows a demonstration of adding the Minor Scales KPI category to the student named Leela Divya.

The following image demonstrates assigning the Chromatic Scales KPI category for a sub-group of students including Anup Akshay, James Anthony, Rajinder Ratna, Justine Waller, and Stephen Palmer.

Click on the Enroll button at the bottom of the page to save your changes. Now you will be redirected back to the first page, shown below.

In the image, the individual student (Leela Divya, labeled with a red line) is combined with the rest of the students in the same list of enrollments.
But Leela will see the Minor Scales KPI category in her class whereas the rest of the group (labeled with a green line) will see the Chromatic Scale KPI in their classroom.