The PL+ extension is a Chrome add-on developed by bar. It is a free tool that enhances the functionality of PrarieLearn, specifically in relation to students' grade portfolios.

With the PL+ extension enabled, users can navigate to the "assessments" or "gradebook" tab in PrarieLearn. Here, checkboxes are available next to each grade, allowing users to control which grades are included in the average calculation. This feature provides students with greater flexibility and control over their grade portfolios, enabling them to focus on specific areas or assignments for improvement.

The PL+ extension is a valuable addition for PrarieLearn users, offering enhanced functionality and customization options for managing grades. It is a useful tool for students who wish to have more control over their academic progress and focus on specific aspects of their coursework.