1.5×
Students in traditional lectures were 1.5 times more likely to fail than with active learning, across 225 studies.
Freeman et al., PNAS (2014)
80% vs 36%
Remembered a week later by students who practised recall, against those who re-studied.
Karpicke & Roediger, Science (2008)
63% vs 20%
Test scores a week later after mixed practice, against one problem type at a time.
Rohrer & Taylor, Instructional Science (2007)
11 of 11
Experiments where students learned more from words with pictures than from words alone.
Mayer, Multimedia Learning (2009)
8
Generative strategies, such as summarising, mapping and self-explaining, that turn information into understanding.
Fiorella & Mayer, Educational Psychology Review (2016)
0.4–0.7
Typical effect sizes when teaching checks what students understand and adapts to it.
Black & Wiliam, Assessment in Education (1998)
27%
Fewer course failures when parents received timely alerts about missed work and grades.
Bergman & Chan, Journal of Human Resources (2021)
Top 2
Practice testing and spaced practice: the most useful of ten study techniques reviewed.
Dunlosky et al., Psychological Science in the Public Interest (2013)
CC
Captions improve understanding of, attention to, and memory for a video.
Gernsbacher, Policy Insights from the Behavioral and Brain Sciences (2015)
These studies describe how people learn in general. They are not results measured on Karmakar Klasses students.