to assign a value (grade or assess) a student's performance, (product, or process) as a means of measuring their growth against "external standards", and that of other students. xpository iece: a written composition that explains or informs an audience. Fair Use: a provision of copyright law which grants particular users (such as educational institutions, teachers, etc.) conditional rights to use (or reproduce) certain copyrighted materials as long as the use follows defined guidelines. ax: 1. (n) a facsimile; 2. (v) to transmit a written document or image by electronic means.