The internship evaluation written by the supervisor often serves as the first professional reference for an intern. This document accompanies the young person’s journey well beyond the time spent in the company: it will be read by recruiters, university panels, sometimes years after the internship ends. Its writing therefore deserves attention that goes beyond the simple administrative exercise at the end of the mission.
The legal and professional weight of the internship evaluation
The supervisor’s evaluation is not a nice bonus slipped into a file. It is an attachment to the internship completion certificate, sometimes directly integrated into the report assessed by the educational institution. In practice, this text engages the credibility of both the supervisor and the intern.
Systems for monitoring skills in the workplace are becoming increasingly structured. In the National Education system, digital platforms like Colibris now track the paths of interns, and the written evaluation synthesizes observations collected throughout the period. Training programs like AFEST also formalize the role of the supervisor with observations in the workplace and documented exchanges of practices.
Consulting a sample of a positive internship evaluation helps calibrate the expected level of detail and avoid overly vague formulations that do a disservice to the intern.
This growing formalization means that a rushed evaluation, filled with generalities, is immediately recognizable. A recruiter reading “serious and motivated intern” without any concrete facts gains nothing from it. The document loses its value as evidence.
Writing a valuable internship evaluation: choosing facts over adjectives
The most common temptation is to pile on positive qualifiers. “Dynamic,” “rigorous,” “involved”: these words cost nothing and convey nothing. A useful evaluation describes what the intern has done, not what they are.
Anchoring each skill in a real task
Rather than writing “good adaptability,” the supervisor benefits from describing the specific situation that revealed this skill. The intern took over a project midway after a colleague left, switched software tools during the mission, managed an unexpected situation during an event: it is this factual narrative that gives weight to the evaluation.
The grids used by some universities distinguish four families of skills to document:
- Technical skills: mastery of tools, application of work methods specific to the sector, quality of deliverables produced
- Interpersonal skills: ability to work in a team, communication with internal and external stakeholders, integration into the group
- Organizational skills: management of priorities, meeting deadlines, autonomy in task planning
- Personal skills: initiative, analytical ability, writing quality
The supervisor does not need to cover each category exhaustively. Two or three specific examples, well-situated in the context of the assigned tasks, are worth more than a superficial sweep of all categories.
Formulating areas for improvement without devaluing
An exclusively positive evaluation loses credibility. Recruiters and educators know this: an intern in training necessarily has areas for improvement. Mentioning an area for improvement shows that the supervisor has genuinely observed the work.
The nuance lies in the formulation. “Communication to be strengthened” is a dry verdict. “Speaking up in team meetings, still hesitant at the beginning of the internship, has improved over the weeks; continuing in this direction will be an asset” tells a story. The intern is not stuck in a flaw; they are in motion.
Common mistakes in internship evaluations by supervisors
Some pitfalls recur from one supervisor to another, regardless of the industry or the intern’s level.
Writing the evaluation at the last minute systematically degrades its quality. Without notes taken throughout the internship, the supervisor resorts to general impressions and catch-all phrases. Keeping a tracking notebook, even a brief one, with the tasks assigned and observations week by week, radically changes the final result.
The other frequent trap concerns copy-pasting between successive interns. An evaluation that could apply to anyone serves no one. The intern’s name, the titles of their tasks, the tools used, the context of the team: these elements personalize the text and give it documentary value.
Finally, confusing evaluation with a letter of recommendation muddles the message. The evaluation assesses a specific period with its tasks and context. The recommendation projects the intern into the future. The supervisor can mention perceived potential, but the body of the text must remain anchored in the facts observed during the internship.
Structuring the evaluation text for it to be read and remembered
A compact block of text discourages reading. Whether the evaluation is five lines or twenty, its readability depends on a simple logical order:
- Reminder of the context: dates, hosting service, main tasks assigned to the intern
- Evaluation of observed skills, supported by concrete examples drawn from the tasks
- Areas for improvement formulated constructively, showing the progress observed during the period
- Overall assessment in one or two sentences, including, if relevant, a mention of the intern’s ability to integrate into a professional environment
This sequencing is not rigid. A short internship of a few weeks calls for a concise text. A long internship, lasting several months, justifies a more detailed development with chronological steps.
Adapting the length of the evaluation to the actual duration of the internship avoids two symmetrical pitfalls: the skeletal text that gives the impression of the supervisor’s disinterest, and the lengthy text that drowns useful information under conventional phrasing.
The last paragraph deserves special attention. It is the one that the recruiter reads first when scanning the document. A factual summary sentence that encapsulates the intern’s contribution and their level of autonomy at the end of the period leaves a clearer impression than a generic polite formula.
