Proven Results

Literacy outcomes that you can trust

Backed by independent research and trusted by thousands of educators, our literacy programmes Core5® Reading and PowerUp® Literacy are research-proven to accelerate learning, close literacy gaps and support every learner - whatever their ability.

Jump to Core5® Reading Results

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Proven Results for Core5® Reading

Impact

Core5® Reading: Proven by the Education Endowment Foundation (EEF)

In a large scale independent EEF efficacy trial across 57 schools and involving 697 pupils, Lexia users made:

+1 month of additional progress in overall reading skills compared to the control group.
+2 months’ progress in word recognition and decoding skills specifically.
+1 month in reading fluency and comprehension.

FSM results:

+2 months additional reading progress

Closing the gap

These results indicate that Lexia Core5® Reading has the potential to narrow the attainment gap between FSM and non-FSM pupils, a key priority for many schools.

All of this was achieved with just 24 – 48 hours of use spread over one to two school terms.

What educators said

Staff reported positive experiences, noting improved pupil engagement and the value of automated progress tracking.

School leaders reported the programme was easy to implement and required little ongoing teacher input, making it cost-effective and scalable.

High security / Low-cost rating

The trial earned 4 padlocks (out of 5), indicating high confidence that the observed impact was due to the programme itself and not other factors.

The study reported the cost of Lexia to be ‘very low’ when compared against other interventions.

Lexia Core5 Reading – an EEF Promising Programme

The EEF Promising Programme initiative is a curated list of educational programmes that have shown promising results in improving pupil attainment, based on independent and robust evaluations by the Education Endowment Foundation (EEF).

Read full EEF Report on Lexia Core5® Reading

Explore our full Research Library

PowerUp® Literacy: supporting literacy in secondary schools

Independent evaluations aligned to the strongest US research standards (ESSA) show that Lexia PowerUp® Literacy is more than twice as effective as the average (traditional) adolescent reading intervention programme for 11-13 year olds.

Another independent study utilising the STAR Reading® assessment (a trusted tool used by schools worldwide to measure reading ability) evaluated the impact of PowerUp® Literacy on struggling and non-proficient readers. The findings provide strong evidence that:

The programme results in significant improvements in reading score.
There was consistent progress across different timescales, even after a few weeks.
There were positive outcomes for all learners, including pupils with SEND, FSM (pupil premium), English as an additional language (EAL) and those from diverse backgrounds.

Proven impact across classrooms

Research shows that Core5® Reading and PowerUp® Literacy deliver greater gains in reading than traditional instruction, with effect sizes ranging from 0.06 to 0.74.

Consistent results over time
Benefits were seen in studies of all lengths, from half-year to multi-year, proving the lasting impact of our literacy programmes.
Effective for every learner
Pupils of all ages and backgrounds made measurable progress, including English language learners and those with SEND.
Supports differentiated learning
Both of our literacy programmes adapt to varied reading profiles, giving each student the personalised support they need to succeed.

Why this matters for schools

Rapid, measurable gains with pupils showing progress even with short usage periods.
Cost-effectiveness with digital-first delivery and reassignable licenses that reduce wasted resources.
Inclusive impact with SEND, EAL and disadvantaged learners e.g. FSM (pupil premium) benefitting alongside their peers.
Sustained outcomes that are research-proven across weeks, terms and even years.

Trusted by educators

Thousands of schools across the UK and Ireland rely on Lexia every day, with 93% of educators reporting improved outcomes. Beyond the numbers, teachers see the benefit of our literacy programmes first-hand with: improved engagement, greater confidence and the development of lifelong readers.

Find out how we support educators