For Project assessment, view each of the Challenge you want to assess and click on the 'Project Submissions' tab. Click on each individual project and click on the green 'Assess Project' button. Afterwards, you can see the project assessment criteria you've previously created and assess the project based on the following the assessment guideline. Then, leave a comment and click on the green "Submit Assessment' button in the bottom right of the pop-up.

Watch the video below for a walkthrough on how to create your project assessment guidelines and assessing projects.