Peer assessment: Workshop
Workshop is a peer assessment activity with many options. Students submit their work via an online text tool and attachments. There are two grades for a student: their own work and their peer assessments of other students' work.
Official Moodle document: Workshop
Video tutorial: Workshop
NewGood practice
Students can submit their assignment in various formats (e.g. uploading video links, images, a written document, etc..)
You can send out example submissions, along with a reference task, which can be accessed by the students.
Use examples: If this function is enabled, students can try assessing example submissions provided for practice in assessment.
This grade will not be counted.
Use Self assessment: If you would like to let students to assess their own submission, enable this.Reference
http://www.mylmstips.com/using-moodle-workshop-tips-and-tricks/