74% of surveyed students improved their grades while using Medly.
Real data from GCSE results day showing how Medly students outperformed expectations across every subject.
GCSE Results Day 2025
21 Aug 2025
Today we're sharing something we're genuinely excited about. Our students just received their GCSE results.
The Results
74% of surveyed students improved their grades while using Medly.
40.5% improved by two or more grades.
Surveyed students improved across all subjects:
- English Literature: 46% improvement
- Physics: 43% improvement
- English Language: 42% improvement
- Mathematics: 31% improvement
- Chemistry: 29% improvement
- Biology: 27% improvement
How Medly Works
Medly is the first AI tutor for GCSEs and A-Levels. Built on neuroscience and teaching theory, Medly is a personalised AI tutor that adapts to how students learn.
Private tutoring is expensive — the Sutton Trust (2019) found an average rate of around £24 per hour, so weekly tutoring adds up to roughly £96/month. From £24.99/month, Medly delivers personalised tutoring at a fraction of the cost of private tutoring. See our full cost comparison.
What This Means
These results show something important. Truly personalised education doesn't have to be a privilege for families who can afford private tutoring.
With three-quarters of our surveyed students improving their grades while using Medly, we're working to democratise education and unlock the full potential of every student.
Improvements were greatest in Physics and English Literature, two of the most challenging GCSE subjects. By engaging students like a personal tutor would, adapting to each student and helping them think through complex scientific reasoning and challenging texts, Medly aims to make a real impact.
Consistent improvements across all subjects show we're reaching all types of learners.
Moving Forward
Every grade improvement represents a student who understood something better. Built confidence they didn't have before. Opened up opportunities to futures that may not have been possible before.
To our students: your hard work made this happen. To parents: thank you for trusting us with their journey.
Congratulations to all our students.
Methodology
Survey design. 1,500 students registered for Medly's GCSE 2025 mock examinations were emailed a survey on GCSE results day (21 August 2025), asking them to self-report their target grades, their Easter 2025 Medly Mock grades, and their actual GCSE grades across up to six subjects (Biology, Chemistry, Physics, English Language, English Literature, and Mathematics). 626 students responded — a 41.7% response rate for an email-only survey with no follow-up reminders. Grades were reported the same day they were received, minimising recall error.
Analytical sample. Students with a mean Medly Mock grade above 8.0 out of 9 were excluded (n=131) because further improvement is mathematically constrained at the top of the grade scale — a student who scored 9 on the mock cannot score higher than 9 on the real examination. Excluding ceiling-capped observations from pre-post gain analyses is standard practice in educational measurement (Koedel & Betts, 2010; Staus, O'Connell & Storksdieck, 2021). After this adjustment, the primary analytical sample comprised 398 students.
Primary finding. 74.1% of students in the analytical sample (295 of 398) improved by at least one GCSE grade in one or more subjects between their Easter Medly Mock and their actual GCSE results (95% CI: 69.8%–78.4%). 40.5% improved by two or more grades.
Engagement and improvement. All students in the sample participated in Medly Mocks and used them as a revision resource. Students who additionally used the practice question bank improved at a higher rate than those who used the Medly Mocks alone (79% vs 69%; χ² = 4.75, p = 0.029). The gap was larger for substantial improvement: 49% of students who also used the question bank improved by two or more grades, compared to 31% of those who used the mocks alone.