Introduction
As high school students approach their final years, gaining practical experience through internships becomes increasingly important. Not only do internships provide valuable hands-on experience, but they also contribute to earning high school credits. In 2026, many schools are adopting internship programs as part of their curriculum, allowing students to earn credits while gaining real-world experience.
An internship letter is a formal document that outlines the terms of the internship, including the role, responsibilities, and duration. It also serves as an agreement between the student, the school, and the employer. This article provides 16 examples of internship letters that can be used for high school credits in 2026.
These letters are professionally styled and cover a variety of scenarios, from application letters to completion certificates. They are designed to be SEO-optimized, ensuring they meet the latest standards for online visibility and professional presentation.
1. Internship Application Letter
123 Student Lane
Springfield, IL 62704
February 15, 2026
Dear Hiring Manager,
I am writing to express my interest in the internship program at Tech Innovators Inc. As a high school junior, I am eager to gain hands-on experience in the tech industry while earning credits toward my graduation.
I am confident that my skills in programming and problem-solving will make me a valuable asset to your team. I look forward to the opportunity to contribute to your projects and learn from your experienced professionals.
Thank you for considering my application. I am available to start immediately and can commit to 15 hours per week.
Sincerely,
John Doe
2. Internship Acceptance Letter
456 Company Drive
Chicago, IL 60601
March 1, 2026
Dear Ms. Jane Smith,
We are pleased to accept your application for the internship program at Green Energy Solutions. We believe your passion for environmental science will be a great fit for our team.
Your internship will begin on April 1, 2026, and will last for 12 weeks. You will be working closely with our research and development team to contribute to innovative energy solutions.
Please confirm your acceptance by signing and returning the attached agreement by March 15, 2026.
Sincerely,
Michael Brown
Internship Coordinator
3. Internship Completion Certificate
789 School Road
Dallas, TX 75201
May 20, 2026
Certification of Internship Completion
This is to certify that Emily Johnson has successfully completed her internship at Dallas Healthcare Services from March 1, 2026, to April 30, 2026.
During her internship, Emily demonstrated exceptional skills in patient care and administrative support. She contributed significantly to our team and has earned 5 high school credits for her participation.
Congratulations on your successful completion!
Sincerely,
Dr. Sarah Lee
Internship Supervisor
4. Internship Offer Letter
321 Corporate Avenue
New York, NY 10001
April 5, 2026
Dear David Martinez,
We are delighted to offer you an internship position at Global Marketing Firm. We were impressed by your resume and your passion for digital marketing.
Your internship will begin on May 1, 2026, and will last for 16 weeks. You will be working on real marketing campaigns and will have the opportunity to earn 6 high school credits.
Please review the attached terms and conditions and confirm your acceptance by April 20, 2026.
Sincerely,
Linda Davis
HR Manager
5. Internship Request Letter
654 Student Boulevard
Los Angeles, CA 90001
January 10, 2026
Dear Dr. Robert Thompson,
I am writing to request an internship opportunity at California Research Institute. As a high school senior, I am eager to gain hands-on experience in scientific research while earning credits toward my graduation.
I am particularly interested in your biology research program and believe it would be an excellent fit for my academic goals. I am available to start immediately and can commit to 20 hours per week.
Thank you for considering my request. I look forward to the opportunity to contribute to your research team.
Sincerely,
Sophia Garcia
6. Internship Confirmation Letter
987 Company Street
Miami, FL 33101
April 10, 2026
Dear Mr. Daniel Wilson,
We are pleased to confirm your internship at Miami Tech Startups. We have reviewed your application and are excited to have you join our team.
Your internship will begin on May 1, 2026, and will last for 12 weeks. You will be working on exciting tech projects and will have the opportunity to earn 4 high school credits.
Please find attached the detailed schedule and terms of the internship. We look forward to welcoming you to our team.
Sincerely,
Maria Rodriguez
Internship Coordinator
7. Internship Evaluation Letter
555 School Drive
Houston, TX 77001
June 1, 2026
Evaluation of Internship Performance
This letter serves as an evaluation of the internship performance of James Wilson at Houston Engineering Firm.
James demonstrated exceptional skills in engineering design and problem-solving. He contributed significantly to our team and has earned 6 high school credits for his participation.
Congratulations on your outstanding performance!
Sincerely,
Dr. Michael Chen
Internship Supervisor
8. Internship Termination Letter
333 Corporate Way
Atlanta, GA 30301
May 5, 2026
Dear Ms. Laura Brown,
We regret to inform you that your internship at Atlanta Financial Services has been terminated, effective immediately.
This decision was made due to unforeseen circumstances within the company. We appreciate your contributions during your time with us and wish you the best in your future endeavors.
You will receive your final payment and any earned credits within the next two weeks.
Sincerely,
David Lee
HR Manager
9. Internship Extension Letter
777 Business Road
Boston, MA 02101
June 10, 2026
Dear Mr. William Davis,
We are pleased to offer you an extension of your internship at Boston Legal Services. Your contributions have been invaluable to our team.
Your internship, originally set to end on July 1, 2026, has been extended until August 31, 2026. This will provide you with additional opportunities to gain experience and earn more high school credits.
Please confirm your acceptance by signing and returning the attached agreement.
Sincerely,
Sarah Mitchell
Internship Coordinator
10. Internship Reference Letter
888 Professional Lane
Seattle, WA 98101
July 15, 2026
Dear Ms. Emily Taylor,
It is with great pleasure that I write this letter of recommendation for your internship at Seattle Art Studio. Your creativity and dedication were truly impressive.
During your internship, you demonstrated exceptional skills in graphic design and contributed significantly to our team. You have earned 5 high school credits for your participation.
I am confident that you will excel in any future endeavors. Please feel free to contact me for any further recommendations.
Sincerely,
Dr. Lisa Nguyen
Internship Supervisor
11. Internship Application Follow-Up Letter
999 Student Avenue
Denver, CO 80201
March 20, 2026
Dear Hiring Manager,
I am writing to follow up on my internship application submitted on February 15, 2026, for the position at Denver Environmental Solutions.
I am still very interested in the opportunity to gain hands-on experience in environmental conservation while earning high school credits. I would appreciate any update on the status of my application.
Thank you for considering my application. I look forward to the opportunity to contribute to your team.
Sincerely,
Olivia Green
12. Internship Offer Acceptance Letter
1234 Company Boulevard
Washington, D.C. 20001
April 25, 2026
Dear Ms. Sophia Martinez,
I am pleased to accept the internship offer at Washington Policy Institute. I am excited to gain experience in public policy while earning high school credits.
I confirm that I will begin on May 1, 2026, and will commit to 18 hours per week. I have attached the signed agreement for your records.
Thank you for this opportunity. I look forward to working with your team.
Sincerely,
Alexander Rivera
13. Internship Program Description Letter
567 Program Street
Phoenix, AZ 85001
April 30, 2026
Dear Students and Parents,
We are excited to introduce our 2026 Internship Program at Phoenix Tech Academy. This program is designed to provide high school students with hands-on experience in the tech industry while earning credits toward graduation.
The program will run from June 1, 2026, to August 31, 2026, and will offer opportunities to work on real tech projects. Students will earn up to 6 high school credits upon successful completion.
Applications are now open, and the deadline is May 15, 2026. We look forward to welcoming our next group of interns!
Sincerely,
Dr. James Wilson
Program Director
14. Internship Program Announcement Letter
678 Announcement Drive
Philadelphia, PA 19101
May 10, 2026
Dear Students and Faculty,
We are pleased to announce the launch of our 2026 Internship Program at Philadelphia Healthcare Services. This program is designed to provide high school students with valuable experience in the healthcare industry while earning credits toward graduation.
The program will offer internships in various departments, including patient care, administrative support, and research. Students will have the opportunity to earn up to 5 high school credits upon successful completion.
Applications are now open, and the deadline is June 1, 2026. We look forward to welcoming our next group of interns!
Sincerely,
Dr. Maria Rodriguez
Program Director
15. Internship Program Completion Letter
789 Completion Lane
San Francisco, CA 94101
August 20, 2026
Certification of Internship Completion
This is to certify that Michael Brown has successfully completed his internship at San Francisco Tech Startups from June 1, 2026, to August 31, 2026.
During his internship, Michael demonstrated exceptional skills in software development and contributed significantly to our team. He has earned 6 high school credits for his participation.
Congratulations on your successful completion!
Sincerely,
Dr. Sarah Lee
Internship Supervisor
16. Internship Program Evaluation Letter
890 Evaluation Road
Detroit, MI 48201
September 1, 2026
Evaluation of Internship Program
This letter serves as an evaluation of the 2026 Internship Program at Detroit Automotive Solutions.
The program was a great success, with students demonstrating significant growth in their skills and knowledge. All participants earned the maximum number of high school credits available for their participation.
We look forward to continuing this program in future years and providing more students with valuable hands-on experience.
Sincerely,
Dr. John Smith
Program Director
Conclusion
These 16 internship letters provide a comprehensive guide for high school students seeking to earn credits through internships in 2026. Whether you’re applying for an internship, confirming participation, or completing the program, these examples will help you navigate the process with confidence. Remember to tailor each letter to your specific needs and ensure all details are accurate and professional.
Good luck with your internship journey and earning your high school credits!