An educational network for grading the performance of a student in a test sat by a plurality of students, comprising a database storing a test to be assessed for said plurality of students; a plurality of student work stations connected to said database to enable said plurality of students to input answers to said task, wherein said answers are stored on said database; and a controller. Said controller being configured to distribute each answer by each said student to at least two other students from the plurality of students; collect scoring data for each answer from the at least two other students; determine outlying results in said scoring data; calculate a performance mark for each said student based on said collected data without said outlying results; calculate a conformance value for each said student based on the difference between the scoring data awarded by each said student to other students from the plurality of students and calculated performance marks for each of said other students marked by each said student, and calculate an overall grade for each said student from said calculated performance mark and said consistency.