Research on Individual Tuition

Summary: why individual tuition works

Individual tuition works because it removes the constraints of the average classroom: the teacher can match the student's pace, diagnose gaps immediately, give instant feedback, and adapt explanations until the concept clicks. Researchers call this adaptive instruction — and it is far easier to deliver with one student than with thirty.

• Immediate feedback — mistakes corrected in the moment, not weeks later in an exam
• Custom pacing — slow down on hard topics, accelerate where the child is strong
• Targeted practice — focus only on weak chapters or subjects
• Higher engagement — shy students ask questions they would never raise in a batch
• Exam alignment — syllabus and board pattern taught to the individual's timeline

International meta-analyses

• 0.37 SD

  Nickow, Oreopoulos & Quan (2020)

  A systematic review and meta-analysis of 96 randomised controlled trials on preK–12 tutoring found consistent, substantial positive impacts on learning, with a pooled effect size of 0.37 standard deviations — roughly 14 percentile points. Effects were stronger when tutoring was led by teachers or trained tutors, and in earlier grades.

  Source: NBER Working Paper 27476
• 0.33 SD

  Cohen, Kulik & Kulik (1982)

  An earlier meta-analysis of 65 tutoring studies reported an average effect of about 0.33 standard deviations (13 percentile points) — one of the largest effects in education research at the time, and a finding that has held up in later reviews.

  Source: Cohen, P. A., Kulik, J. A., & Kulik, C. L. C. (1982). Educational outcomes of tutoring: A meta-analysis of findings. American Educational Research Journal.
• ~5 months

  Education Endowment Foundation (EEF)

  The UK's EEF Teaching & Learning Toolkit — synthesising 123 studies — rates one-to-one tuition as high impact, providing approximately five additional months of progress on average. Primary pupils tend to gain more (+6 months) than secondary (+4 months). Short, regular sessions (about 30 minutes, several times per week) show optimum results.

  Source: EEF One to One Tuition Toolkit
• 2σ (ideal)

  Bloom's "Two Sigma Problem" (1984)

  Educational psychologist Benjamin Bloom argued that one-to-one tutoring offered "the best learning conditions we can devise." Small controlled experiments in his review showed gains of up to two standard deviations above conventional classroom instruction. Later large-scale meta-analyses find smaller but still impressive average effects — the key takeaway is that individual instruction consistently outperforms business-as-usual schooling.

  Source: Bloom, B. S. (1984). The 2 Sigma Problem. Educational Researcher. See also Education Next summary.

Research in India

• 0.14 SD

  Private tutoring & learning levels (ASER data)

  Using large-scale ASER household survey data from rural India with fixed-effect methods to control for background factors, researchers found a positive, statistically significant effect of private tutoring on reading and maths for Classes 1–8. The estimated gain is about 0.14 standard deviations — comparable to an additional year of schooling. Effects were stronger for disadvantaged students: children in government schools, from lower-income households, and with less-educated parents benefited most.

  Source: Dongre, A., & Tewary, V. — Accountability Initiative / ASER-based working paper. PDF
• 60% gap closed

  ASER analysis on tuition & reading (Wadhwa, 2013)

  Analysis of ASER data on Std 5 reading levels found that private tuition helped government-school children substantially — additional tutoring bridged roughly 60% of the learning gap between government and private school students. Tuition also helped private-school pupils, but the relative gain was largest for those starting from weaker baselines.

  Source: Wadhwa, W. (2013). ASER Centre analysis — ASER 2013 report section

India has one of the world's highest rates of private supplementary tutoring — often called "shadow education." Research confirms what millions of Indian parents already observe: structured extra teaching, especially when targeted to a child's gaps, measurably improves outcomes.

One-to-one vs group tuition

Studies comparing one-to-one and small-group tutoring (2–3 students) show mixed results — sometimes group tutoring matches one-to-one when teaching quality is high. What is consistent across research is that smaller instructional groups dramatically outperform large batches, and that the personalised elements — feedback, pacing, diagnostic teaching — matter more than group size alone.

CLAPS chooses strict one-to-one tuition because:

• Every child gets 100% of the teacher's attention for the full session
• No peer pressure or embarrassment when asking basic doubts
• Schedule and subject selection fit each family individually
• Parents of KG to +2 students consistently report that personal attention is the reason they chose individual over group classes

How CLAPS applies the evidence

CLAPS Individual Tuition is designed around principles that research identifies as effective:

• One teacher, one student — never batch classes
• Syllabus-aligned content — linked to school curriculum (CBSE, Kerala State, ICSE)
• Subject experts — specialist teachers, not generalists covering every subject poorly
• Flexible regular sessions — parents schedule ongoing classes at preferred times
• Coordinator monitoring — academic support team available 10 AM – 10 PM
• Pick subjects individually — target weak areas rather than generic packages

CLAPS is part of ClapsLearn, which has taught 10,000+ students with a 4.9 Google rating — real-world outcomes alongside research-backed methods.

Full reference list

1. Bloom, B. S. (1984). The 2 Sigma Problem: The Search for Methods of Group Instruction as Effective as One-to-One Tutoring. Educational Researcher, 13(6), 4–16.
2. Cohen, P. A., Kulik, J. A., & Kulik, C. L. C. (1982). Educational outcomes of tutoring: A meta-analysis of findings. American Educational Research Journal, 19(2), 237–248.
3. Nickow, A. J., Oreopoulos, P., & Quan, V. (2020). The Impressive Effects of Tutoring on PreK-12 Learning: A Systematic Review and Meta-Analysis of the Experimental Evidence. NBER Working Paper 27476.
4. Education Endowment Foundation (2024). One to one tuition — Teaching & Learning Toolkit. educationendowmentfoundation.org.uk
5. Dongre, A., & Tewary, V. Impact of Private Tutoring on Learning Levels (ASER-based study). Accountability Initiative PDF
6. Wadhwa, W. (2013). Private inputs into schooling — ASER Centre analysis. ASER 2013 PDF
7. VanLehn, K. (2011). The relative effectiveness of human tutoring, intelligent tutoring systems, and other tutoring systems. Educational Psychologist, 46(4), 197–221.
8. Kraft, M. A. (2015). How to Make Tutoring More Effective. Education Next. — Practical synthesis of tutoring evidence.

Note: Effect sizes vary by study design, tutor quality, and context. Research summarises averages — individual results depend on student effort, teacher quality, and consistency of attendance. CLAPS does not claim specific grade guarantees; we provide the one-to-one model that evidence identifies as high-impact.

Related pages

• Benefits of Individual TuitionParent-friendly summary
• Online TuitionCLAPS programme
• FAQCommon questions