Multiple published studies demonstrate strong evidence of program effectiveness and highlight Lexia’s unparalleled depth and breadth of efficacy research

BOSTON (April 12, 2018) – As educators across the country strive to align their instructional plans with the requirements of the Every Student Succeeds Act (ESSA), Lexia Learning, a Rosetta Stone Inc. (NYSE: RST) Company, stands apart with an unmatched depth and strength of evidence of program effectiveness.

ESSA requires Title I schools to utilize evidence-based instructional programs that have demonstrated positive effects on student learning outcomes. This focus on efficacy has established a more rigorous standard for proving what’s working in classrooms and helps schools, districts, and states to shape the future of teaching and learning. Lexia, with a 30-year history of efficacy research, has multiple studies demonstrating the strongest level of evidence according to ESSA legislation.

ESSA legislation categorizes evidence into three different levels: Strong, Moderate and Promising. Lexia has eight studies with Strong evidence—the highest level of rigor defined by ESSA—and an additional seven studies with Moderate or Promising evidence.

· Strong evidence is defined as well-designed, well-implemented experimental studies that include randomly assigned treatment and control groups to eliminate selection biases. This is the highest level of evidence as defined by ESSA, and Lexia has eight studies in this category.

· Moderate evidence is defined as well-designed, well-implemented quasi-experimental studies with treatment and control groups that may not be randomly assigned. There may be some selection biases that are statistically addressed. Lexia has three studies with Moderate evidence.

· Promising studies include correlational evidence that the program has an impact. These studies may not include a control group, but selection effects are addressed statistically. This is the lowest level of evidence as defined by ESSA, and Lexia has four studies in this category.

“The requirements of ESSA underscore the approach Lexia has taken for more than three decades,” said Lexia President Nick Gaehde. “Educators should have confidence that the instructional resources they choose will deliver a statistically significant impact on student outcomes; and Lexia’s 15 efficacy studies not only satisfy the requirements under ESSA, but provide scientific evidence of our programs’ effectiveness.”

More information about Lexia’s efficacy research can be found at www.lexialearning.com/research.

Lexia’s flagship product is Lexia Reading Core5, a research-proven, technology-based program that accelerates the development of fundamental literacy skills for students of all abilities in grades pre-K–5. Following a scope and sequence built for rigorous state standards, Core5 provides explicit, systematic instruction through personalized learning paths in six areas of reading. Core5 seamlessly adapts based on student performance, targeting skill gaps as they emerge and equipping teachers with the data and instructional resources they need to personalize instruction for every student. Embedded assessment technology predicts students’ year-end performance and provides ongoing norm-referenced and actionable data to help teachers prioritize and plan instruction with the offline instructional materials.

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About Lexia Learning

Lexia Learning, a Rosetta Stone company, empowers educators through adaptive assessment and personalized instruction. For more than 30 years, the company has been on the leading edge of research and product development as it relates to student reading skills. With a robust offering that includes solutions for differentiated instruction, personalized learning and assessment, Lexia Learning provides educators with the tools to intensify and accelerate literacy skills development for students of all abilities. For more information, visit .

About Rosetta Stone

Rosetta Stone Inc. (NYSE: RST) is dedicated to changing people’s lives through the power of language and literacy education. The company’s innovative digital solutions drive positive learning outcomes for the inspired learner at home or in schools and workplaces around the world.

Founded in 1992, Rosetta Stone’s language division uses cloud-based solutions to help all types of learners read, write, and speak more than 30 languages. Lexia Learning, Rosetta Stone's literacy education division, was founded more than 30 years ago and is a leader in the literacy education space. Today, Lexia helps students build fundamental reading skills through its rigorously researched, independently evaluated, and widely respected instruction and assessment programs.

For more information, visit . “Rosetta Stone” is a registered trademark or trademark of Rosetta Stone Ltd. in the United States and other countries.

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