1. Bloom's two-sigma problem
Effect: 2.0 SD
Bloom compared conventional classroom teaching, mastery learning in a classroom,
and individual tuition combined with mastery learning. Students receiving
individual tuition performed two standard deviations above the mean of
conventionally taught students, placing the average tutored student above
approximately 98 percent of the comparison group.
Bloom framed this as a problem rather than a solution: individual tuition cannot
be resourced for every student. For four decades the finding stood without a
practical answer. The University's platform is an attempt at one, and the
mechanism Bloom identified — responsive individual instruction with
immediate feedback — is what it sets out to reproduce.
Bloom, B. S. (1984). The 2 Sigma Problem. Educational Researcher, 13(6), 4–16. doi:10.3102/0013189X013006004
2. Intelligent tutoring compared with human tutoring
0.76 vs 0.79 SD
VanLehn compared human tutoring, intelligent tutoring systems and other methods
of instruction. Step-level tutoring systems, which give feedback at each stage
of a problem rather than only on the final answer, achieved an effect of 0.76
standard deviations against 0.79 for human tutoring. The difference was not
statistically significant.
The finding matters because it locates the effect in the step-level interaction
rather than in the presence of a person. The University's comprehension checks
operate at that level: they engage with a student's reasoning rather than
marking a final answer right or wrong.
VanLehn, K. (2011). The Relative Effectiveness of Human Tutoring, Intelligent Tutoring Systems, and Other Tutoring Systems. Educational Psychologist, 46(4), 197–221. doi:10.1080/00461520.2011.611369
3. Mastery learning
Consistent positive effect
Kulik, Kulik and Bangert-Drowns examined 108 controlled evaluations of mastery
learning, in which students must demonstrate understanding of one unit before
proceeding to the next. Effects on achievement were consistently positive, and
strongest where corrective instruction was provided to students who did not
initially demonstrate mastery.
The University's lessons follow this structure. A comprehension check must be
passed before a lesson proceeds; where it is not, the material is revisited and
the check attempted again. The gate is supportive rather than punitive, and
there is no limit on attempts.
Kulik, C. L. C., Kulik, J. A., & Bangert-Drowns, R. L. (1990). Effectiveness of Mastery Learning Programs: A Meta-Analysis. Review of Educational Research, 60(2), 265–299. doi:10.3102/00346543060002265
4. Formative assessment
0.4 to 0.7 SD
Black and Wiliam reviewed more than 250 studies of assessment conducted during
learning, for the purpose of improving it, rather than at its conclusion for the
purpose of grading. Effects fell between 0.4 and 0.7 standard deviations, among
the largest recorded for any educational intervention, and were largest for
lower-attaining students.
Continuous comprehension credit is a direct application. Assessment is
distributed through each lesson rather than concentrated at the end of a module,
which is also what makes it possible for a student to discover a gap in
understanding while there is still time to address it.
Black, P., & Wiliam, D. (1998). Assessment and Classroom Learning. Assessment in Education, 5(1), 7–74. doi:10.1080/0969595980050102
5. Adaptive learning systems
Significant positive effect
Wang and colleagues synthesized controlled studies of adaptive learning systems
across school and higher education. Effects on achievement were significantly
positive, and largest where systems gave personalized feedback, adapted the
sequence of material to demonstrated performance, and remediated gaps as they
appeared.
The authors noted that benefits were greatest for students who would otherwise
lack access to individualized instruction. That is the population this University
exists to serve.
Wang, T., Lund, B., Marengo, A., Pagano, A., Mannuru, N. R., Teel, Z. B., & Pange, J. (2024). AI-Based Adaptive Learning Systems: A Systematic Review and Meta-Analysis. Interactive Learning Environments. doi:10.1080/10494820.2024.2315099
6. Universal Design for Learning
37.4% improvement
Universal Design for Learning calls for multiple means of engagement,
representation and expression. Originally developed to improve access for
students with disabilities, it has been shown to improve outcomes across a whole
student population where material is presented in several modes and students are
given a choice in how they demonstrate understanding.
Three study formats and eight assessment methods are the University's
implementation. The provision is universal rather than granted on application,
which is the point: an adjustment a student must request is an adjustment many
students never receive.
Buli-Holmberg, J., & Jeyaprathaban, S. (2025). Scientific Reports, 15, Art. 3042.
7. Rapid serial visual presentation and ADHD
Emerging evidence
Rapid serial visual presentation displays text one word at a time in a fixed
position. Research in cognitive psychology and educational accessibility reports
improved comprehension and reduced cognitive fatigue among readers with ADHD,
attributed to the removal of saccadic eye movement and of the visual complexity
of a full page.
This is the basis of the accelerated reading format. We note that the evidence
here is more recent and less extensive than for the findings above, and we
present it as promising rather than settled. Conventional page reading remains
available to every student.
Documented across multiple studies of forced-focus reading interfaces and sustained attention in neurodivergent populations, 2024–2025.