Assessing Student Portfolios in the Middle School Assessing Student Portfolios in the Middle School. Students need to show that they have completed all the required assignments and have made improvements in their writing, such as in the areas of use of writing conventions, organization, including more details, etc. Portfolios in the Middle SchoolAuthor: Kellie Hayden Student Portfolios for Middle and High School Teachers One type of student portfolio contains work that shows the student's progression through the course of the school year. For example, writing samples might be taken from the beginning, middle, and end of the school year. This can help show growth and provide teachers, students, and parents with evidence of how the student has progressed.