Once-a-Week Tutoring Can Work: A Four-Year Broward County Study Shows What’s Needed in Addition
In 2021, more than 800 kindergartners across 13 Broward County public schools were randomly assigned to receive a small amount of one-on-one reading tutoring: short lessons of 5 to 10 minutes, about 2.5 times a week, adding up to roughly 15 minutes of tutoring per student per week. By the end of that first year, 68% of tutored students met the end-of-year early literacy benchmark, compared with just 32% of the students who weren't tutored.
Stanford researchers kept following those children through third grade, and their four-year results, reported by Education Week on August 26, 2026, matter for any South Florida family weighing whether once-a-week tutoring is worth it. The study was not a test of pure time. Rather, it was a test of what a weekly hour must intrinsically provide: brief, regular contact with the same tutor, plus about 10 minutes of aligned practice on the days in between. Fifteen minutes of instruction a week, spread across a week of practice, produced measurable gains over three years. The key, then, was not simply the number of minutes spent with a tutor. It was what happened between those minutes. That is the design that makes once-a-week tutoring work, and it is the design skipped by a lot of tutoring, including much of what families pay for.
What high-dosage tutoring research says
High-dosage tutoring has the strongest evidence base of any academic intervention that researchers have tested. A 2024 review by Andre Nickow, Philip Oreopoulos, and Vincent Quan in the American Educational Research Journal pooled randomized studies of PreK-12 tutoring and found an average gain of 0.29 standard deviations, enough to move a typical student from the 50th percentile to roughly the 61st. The programs behind that number share a consistent design the EdResearch for Action design principles spell out: one-on-one or groups of two to four, 30 to 60 minutes, three or more times a week, for at least 10 weeks, with a consistent tutor and content aligned to classwork. The same brief states that studies have found "little evidence that once-a-week tutoring is sufficient."
But there’s a practical problem with that model. Stanford's National Student Support Accelerator, in its review of five years of tutoring research, found that when districts run these programs at scale, cost and staffing push them toward lower dosage and bigger groups, and that drift accounts for roughly a third of the gap between what the studies promise and what schools deliver. A 2022 federal survey cited in the Education Week piece found that only 37% of schools offer high-dosage tutoring at all. As Stanford's Jilli Jung, who led the four-year study, put it: "There is a lot of evidence saying that intensive tutoring works if implementation is good. But implementation is very difficult."
An intervention that works in theory but rarely gets delivered is not a practical plan. That’s what makes the Broward County results useful.
Fifteen minutes a week, four years, measurable gains
The program in the study, called Chapter One, was built to fit inside a normal school day. Part-time tutors worked in the classroom itself, pulling students for brief one-on-one lessons. Students also practiced about 10 minutes a day on an online platform matched to the skills their tutor had just taught, and tutors gave more time to students who needed it. The district did not have to hire full-time staff or rebuild its schedule, making the model considerably easier to sustain. Cost: about $416 per student per year, less than half the price of the intensive models other districts ran at the same time.
Tutored students scored higher on state tests in each of grades 1 through 3 while the tutoring continued, a gain of roughly 5 to 7 percentile points (effect sizes of 0.12 to 0.17 standard deviations). Two other outcomes stood out. Tutored students were less likely to be placed in special education, and less likely to be held back a grade.
Those gains are smaller than the 11 percentile points from the high-dosage research, and Jung says so directly: "It's harder to expect large effects when the intervention is small, but a lot easier to implement." Let’s look at what 15 minutes a week bought: Three years of higher reading scores, plus a lower chance of retention or special education placement, for a district that could not have staffed the intensive version. For a parent, it answers a question I hear constantly: does a modest, consistent amount of tutoring do anything, or is it all-or-nothing?
It is not all-or-nothing. A small, sustained amount produced gains that most districts' intensive programs never get the chance to deliver.
Why the once-a-week warning doesn't apply to well-designed tutoring
The two findings look contradictory. Researchers warn that once-a-week tutoring isn't enough, and while a program delivering 15 minutes a week produces years of gains. The difference becomes clear once you notice what the research is actually measuring. The warning is about frequency of contact, not simply the number of minutes. The EdResearch brief anticipates this when it notes that young students "may benefit from shorter but more frequent sessions (i.e. 20 minutes, five times a week)." Chapter One answered the frequency issue with two or three brief tutor contacts a week plus daily platform practice,while maintaining the other conditions associated with effective tutoring: one-on-one, the same tutor, content matched to the student's current skill level, and a program that ran for four years instead of 10 weeks.
That is the design of a good private tutoring relationship, provided the weekly hour is designed to extend learning beyond the session itself.When a student meets the same tutor for an hour each week, the tutor diagnoses where understanding breaks down, teaches to that point, assigns focused practice for the days in between, and adjusts the next week based on what the practice revealed. The session is both diagnosis and instruction. The practice between sessions is where much of the learning happens, which is why our academic tutoring always includes work between meetings and why the study skills we teach alongside the content matter as much as the content. At our centers, that assignment is rarely a worksheet. It is usually 15 or 20 minutes a day focused on the specific skill the tutor observed as broken, with the student's mistakes brought back to the next session so the tutor can see what the practice revealed.
The weekly hour also creates something the research measures indirectly:accountability. NSSA's review found students were less likely to be absent from school on days tutoring was scheduled, and that families more involved with the program logged roughly 10 additional hours of tutoring per student. A standing appointment with an adult who knows your child's work creates accountability. A worksheet on the kitchen counter does not. Over a semester, that accountability is what turns 15 sessions into a changed, positive trajectory.
Why a small yearly gain becomes a large one by fourth grade
A 5-point percentile gain in a single year is not enormous. What makes it large is that it repeats.
The Broward students scored higher in first grade,then again in second, and third. A student who is reading on grade level in third grade instead of below is on the right side of that skill line, entering fourth grade where reading stops being a subject and becomes the way every other subject is taught. The study's findings on special education placement and grade retention make the longer-term impact especially clear: modest annual gains, when sustained, changed the trajectory.
The study is about early readers, and I won't pretend it measured teenagers. But the mechanism it isolates, regular contact with the same person and practice on the days between, is not unique to young readers, and it is the pattern behind 40 years of Score At The Top results. A student who spends an hour a week with a math tutor from September through May doesn't just pass Algebra 2. They enter precalculus with fewer gaps, which can change what they can take senior year, and ultimately the transcript a college reads. Our SAT and ACT preparation runs on the same cadence: a weekly session plus assigned practice over three or four months, not a cram week. Test prep is the one corner of tutoring with a scoreboard, and the students who improve most are the ones who show up weekly, on schedule, and do the work in between.
What families should do with this
If your child is behind, or capable of more than current grades show, the research supports starting with what you can sustain instead of waiting until you can afford the most intensive option.
Pick a frequency you will keep. One weekly hour that happens 30 times beats three weekly hours that stop after six weeks.
Insist on the same tutor. Both the NSSA review and the EdResearch principles identify a consistent tutor-student relationship as a core condition for gains. A rotating cast resets the diagnosis each session.
Ask what happens between sessions. If the answer is "nothing," the program is leaving most of its value on the table. The Broward model paired 15 minutes of tutoring with about 10 minutes a day of aligned practice.
Match the content to school. Tutoring aligned with classroom curriculum produces larger gains than generic enrichment. Bring the syllabus, the last test, and the teacher's comments to the first session.
Start earlier than feels necessary. Positive effects described in the tutoring literature are largest in the early grades, and the Broward study shows the gains continue as long as the tutoring does.
If you're unsure whether your child needs tutoring or something closer to academic coaching, which addresses organization and executive function more than subject content, a first session usually reveals the answer.
Frequently Asked Questions
Is once-a-week tutoring enough to make a difference?
Yes, when it is consistent, one-on-one, aligned to schoolwork, and paired with practice between sessions. A four-year Stanford study in Broward County found that about 15 minutes of tutoring per week, plus daily practice, raised state test scores from grades 1 through 3 and reduced grade retention and special education placement. The research warning against once-a-week tutoring is about frequency of contact; between-session practice is how a weekly hour supplies it.
Is high-dosage tutoring better than once-a-week tutoring?
High-dosage tutoring, meaning 30 to 60 minute sessions three or more times a week with a consistent tutor, produces larger gains: about 11 percentile points in a 2024 review, versus 5 to 7 in the Broward study. But only 37% of U.S. schools offered it in a 2022 federal survey, because it is hard to staff and schedule. Lighter tutoring that is sustained and well designed is the option most families can actually keep.
How long does tutoring take to show results?
Research programs typically run at least 10 weeks, and the Broward gains were measured at the end of each school year. Families often see homework and test grades improve within a month, but the durable gains, the ones that change reading level or course placement, come from sustaining tutoring across a semester or a year.
Does the tutor need to be the same person each week?
Yes. Both Stanford's National Student Support Accelerator and EdResearch for Action list a consistent tutor-student relationship as a core design feature of effective tutoring. The same tutor can track where a student's understanding breaks down and build on the prior week; a new tutor each session starts the diagnosis over.
Score At The Top Learning Centers & Schools has been helping Florida families build strong academic foundations for over 40 years. To learn more, visit scoreatthetop.com.
