A 1-hour or 90-minute tutoring session: which length for the student’s age and goal?

A 90-minute session becomes worthwhile when several steps need to follow on from one another — going back over a concept, practising, correcting and preparing what comes next — without the last thirty minutes turning into time the student simply endures.

Clarify the goal before choosing between 1 hour and 90 minutes

The first question is not “how old is the student?” but “what should the session make possible?”. An hour can be more than enough to revisit a misunderstood concept, correct a few exercises, prepare for a targeted test or establish a working method. Conversely, 90 minutes can add real value when a lycée (upper secondary school) or university student needs to work through a dense chapter, tackle a long exercise, prepare for an exam involving several skills or alternate explanation and practice.

It is also important to distinguish the length of a session from the overall intensity of the support. Reviews of tutoring do not show that a longer session is automatically more effective. The Education Endowment Foundation instead highlights the value of short, regular sessions in the tutoring programmes studied. The National Student Support Accelerator, for its part, states that high-impact programmes often use sessions of 30 to 60 minutes several times a week, with shorter formats for young students. This research concerns structured programmes, often run in schools: it does not mean that a family should book three to five tutoring sessions a week. Above all, it is a reminder that a well-targeted hour with proper follow-up can be more useful than a long, poorly structured session.

Another caution: simplistic rules about “attention span” are fragile. A review published in Advances in Physiology Education stresses that the available data do not justify the famous universal limit of ten or fifteen minutes of attention. Engagement depends heavily on how the teaching is done, the activity required and the student themselves. It would therefore be wrong to choose 1 hour or 90 minutes by applying a mechanical formula based on age.

When is 1 hour generally the best starting point?

A one-hour session is often the simplest format to try when the goal is precise. It forces you to prioritise: a few minutes to pick up the context, a main block of work, then a short check of what has been acquired and what remains to be done. This constraint can be useful, particularly when the student arrives after a day of lessons or when the session takes place in the evening.

Situation	Length to try first	Why
Primary school or young collège student	1 hour, or less if necessary	Limit fatigue and keep the session active rather than artificially extending it.
Very targeted difficulty	1 hour	One concept, a few exercises and a final check can fit into a tight framework.
Regular weekly follow-up	1 hour to start with	Continuity between sessions matters more than systematically lengthening each session.
Student who loses focus towards the end of the session	1 hour	The extra thirty minutes have little value if the student is no longer really engaged.
Revising a dense chapter, long piece of homework, exam preparation	90 minutes if the student copes well	The extra time makes it possible to combine diagnosis, explanation, practice and correction.
Independent lycée or university student with several related goals	90 minutes possible	The length can be useful if the session remains divided into active steps.

The table gives a starting point, not a prescription. Two students in quatrième (the third year of collège, lower secondary school) can have opposite needs: one makes full use of 90 minutes because they work through exercises and ask questions; the other reaches saturation after fifty minutes. The length must therefore be confirmed by observation, not by year group alone.

When 90 minutes really adds something

The 90-minute format is mainly justified when it avoids cutting useful work off halfway through. Take a student in terminale (the final year of lycée) preparing for a Maths exam. A session can have four phases: pinpointing the method error, going back over the reasoning, working through a complete exercise and then correcting the paper while making the decisions explicit. If an hour systematically forces you to drop the application or correction phase, an extra thirty minutes can improve the quality of the session.

On the other hand, “having more to cover” is not always a good reason. Adding one chapter after another can simply increase the load without improving learning. Research on spaced learning and retrieval practice shows the value of coming back to knowledge at several points rather than concentrating everything into a single exposure. A review published in Nature Reviews Psychology notes that spacing and having to actively retrieve information from memory promote lasting learning in many contexts. In other words, a longer session only makes sense if it allows better work, not if it is used to “fit in” more content.

A concrete example to help decide

Imagine a student in troisième (the final year of collège) who has difficulties with equations and has a test in ten days. She understands corrections when they are shown to her, but hesitates on her own when faced with a new exercise. For her, starting with 1 hour makes sense: five to ten minutes to diagnose the mistakes, around thirty minutes of explanation and guided exercises, then a final phase in which she solves problems alone and rephrases the method.

At the end of the session, three questions help decide what comes next: did the student have time to work alone? Were the important mistakes corrected? Was she still focused enough to explain what she had just done? If so, there is no point lengthening the session simply “to do more”. You can keep 1 hour and plan targeted work before the next session.

Now change the scenario: same student, but two weeks before the mock Brevet (the end-of-collège exam), with several skills to draw on and a real difficulty switching from one type of exercise to another. If the first hour stays productive to the end but always finishes before the independent practice phase, trying 90 minutes becomes rational. The right indicator is not “she is in troisième, so 90 minutes”, but “thirty more minutes allow a teaching step that is genuinely missing”.

What frequency should you choose?

For a family, the frequency should start from the problem to be solved. Long-term follow-up can work with a regular appointment, provided the student works again between sessions and the tutor can adjust what comes next. A short period before a deadline can temporarily justify a closer rhythm. Conversely, a long session spaced several weeks apart often leaves too much time to lose the thread, especially if no work is done between two sessions.

For a family, the best frequency is the one that maintains real continuity without making the student dependent on the tutor.

A simple criterion helps: between two sessions, the student should have enough time to try alone, run into observable difficulties and come back with material to work on. If they never have time to apply what they learnt, the pace may be too tight. If they systematically forget what was done or build up several new blocks before the next appointment, it may be too widely spaced.

Follow-up between sessions matters as much as the extra thirty minutes

The 1 hour versus 90 minutes debate sometimes hides what really matters: what happens after the session. A productive session can lose much of its value if the student no longer knows what to review, which mistakes to watch out for or which exercise to redo — all things that the 5 useful pieces of information to pass on to parents after a tutoring session should cover. Conversely, a well-framed hour, followed by precise work and a return to it in the next session, can be enough to create steady progress.

This is the logic of the NOEO journey: before, during and after the session, the tutor and the student keep a shared working framework. In how sessions work on NOEO, the online session continues in particular with the session report, the documents and the work to prepare; a replay may also be available when a recording has been authorised and made. The aim is not to artificially lengthen the time spent with the tutor, but to make successive sessions more coherent.

Revision tools can also extend the work when they are relevant. A student can, for example, create a Learn pack from the available material of an eligible session to get a revision sheet, flashcards and a quiz. This replaces neither the exercises set by the tutor nor the next session: it is a way of working again between two appointments.

Mistakes to avoid

• Choosing on age alone. Age matters, but so do fatigue, level of independence, the time of day and the task.
• Confusing length with effectiveness. A 90-minute session is not “50% more effective” than a one-hour session.
• Filling the last thirty minutes. If the tutor has to look for extra content to fill the time, the format is probably too long.
• Turning the session into a passive marathon. A long session must alternate explanation, questions, problem-solving, correction and rephrasing.
• Ignoring work between sessions. Without continuity, increasing the length can artificially make up for an organisational problem.
• Changing format too quickly. It is better to observe two or three comparable sessions before drawing a conclusion, unless there is obvious fatigue or disengagement.

The simplest decision framework

For a first booking, 1 hour is generally a good format to try when the need is targeted or when you do not yet know the student’s stamina. Move to 90 minutes when three conditions are met: the first hour stays productive to the end, an important step is regularly sacrificed for lack of time, and the goal genuinely justifies the extra time. Conversely, go back to 1 hour if the end of the session becomes less active, slower or mostly repetitive.

Finally, look at progress over several sessions rather than at how things feel straight afterwards. The right format is the one that allows the student to understand better, do more alone and know what to work on next. If you still need to choose the tutor with whom to try this framework, you can browse the tutors available on NOEO. For a broader view of the role of online private tutoring and how it is organised, you can also read the complete guide to online private tutoring.