Thank you for your post! It sounds like you are using Standards Based Grading in Learning. You can click on a standard on top of your gradebook and that will allow you to sort by that standard. The top bar just below the standard should display the Class Average for that standard. You can also see each student's overall average across the standards if you map to an overall grade. Here are some resources to help:
Please let us know if we can continue to help with this.