The phrase "additional semester" is correct and usable in written English.
It can be used when referring to an extra term of study added to an academic program or schedule.
Example: "Due to the changes in the curriculum, students may need to enroll in an additional semester to complete their degree requirements."
Alternatives: "extra semester" or "supplementary semester".
An additional semester's worth of testing and school work is invaluable to me, so no early applications here.
The school has a Take Five Scholars Program, which allows students to study for an additional semester or year in areas outside of their majors, tuition free.
Ninth-grade students are required to take the one-semester class and an additional semester is required for graduation.
He spent his time at Harvard teaching economics, and stayed there after September 2003 for an additional semester teaching a course titled "What's Left?
It was August 2009, and after finishing an additional semester following her graduation from Marymount University the previous winter, Sody decided it was time to get a job.
Most biology majors take no more than one year of calculus, although some also take an additional semester of statistics.
Over four additional semesters, the Tree Thinking Concept Inventory (TTCI) was used to assess students' tree-thinking abilities before and after the course.
Now, imagine that you progressed through upper-level Spanish in high school, studied 3 additional semesters of Spanish in college, and you are just back from a semester in Madrid.
The curriculum stipulates three modules in each of the first eight semesters of the course, and more four additional semesters dedicated to internship.
Due to this extra semester, I was forced to take out an additional $15,000 with a 9.75% interest rate.
Applicants for a license must complete an additional 15 semester hours in upper level business courses.
