Currently, there are two tools that faculty can use to provide feedback. The Student Performance Roster (SPR) has been in use since 2011 and allows faculty to identify issues students may be experiencing in a course and to make recommendations about how to improve performance.
For Spring 2018, a new tool is being introduced -- the Student Engagement Roster (SER). The SER allows for a much broader range of feedback to students, including the ability for faculty to send a specific note. By Fall of 2018, the SPR will be retired. Be sure to ask your instructors which tool they will be using for Spring 2018.