Using Moodle's Forum is one way to create simple portfolios of your students' writing, and it is an easy way to integrate portfolio-type work into your course. Students will be able to upload images, audio, video, and files, and classmates and teachers will be able to comment.
First, you will need to set up the Forum for the portfolios. Open your course and create a new Forum with an appropriate title; here we will use 'Writing Portfolio'. In the Forum Introduction, we will write an explanation of the purpose and use of the Writing Portfolio Forum.
When you are setting this up, make sure to change Forum Type to Each person posts one discussion. This will allow each student to set up their own thread to work with. This thread can continue throughout the course, used for a series of assignments, or it can be used for a single assignment.
For grading, and this will depend on your needs for your class, but for now, we will use the Count of ratings, which is...