When a learner has submitted a project within a course, you can correct it by going to the course and click on "Correct projects" at the bottom right of the module:
From there, we go to the part of the uncorrected projects. There, we can:
Download the file;
Leave a comment for the learner;
Define whether the learner succeeded or failed the assignment;
Enter the score.
Once the information is completed, you can save your changes and the learner can, if you have one, access the next module in the course.