“…Moreover, they promote student selfassessment and enable students to communicate their understanding with high level of proficiency (Lambdin & Walker, 1994). Portfolios are employed for authentic assessment purposes through: student self-assessment (Cathcast et al, 2001;Stenmark, 1989;van den Berg, 2004), peer-assessment (Race et al, 2005;Tanner & Jones, 1994), teacher assessment (Kyriacou, 1998), and group assessment (Reicher, 1994;van de Walle, 1998) to measure students" performances as well as learning and progress (Lambdin & Walker, 1994;Lee & Silverman, 2001;NCTM, 2000;van de Walle, 1998). As portfolio assessment is broad and open ended, rubrics or scoring guides have to be set (Kuhs, 1994;Reichel, 1994).…”