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Research and Validation

At Klett World Languages, we are dedicated to conducting rigorous research and continually evaluating the effectiveness of our instructional materials. We believe that research-driven insights not only shape the design of our programs but also empower teachers to create more impactful learning experiences for their students. Grounded in proven methodologies and real-world classroom success, our materials are crafted to support lasting student achievement.

Below, you will find access to our comprehensive collection of Research and Validation documents, including MTSS guides, case studies, white papers, and third-party analyses—offering a deeper understanding of how our materials make a difference in language education.

Why does it matter?

  • Research-backed materials lead to more effective, engaging lessons.
  • Case studies show the impact of our programs in real classrooms.
  • Third-party evaluations ensure you’re using validated resources.
  • Ongoing research keeps you equipped with the latest insights for student success.

Our Research and Validation Library

Multi-Tiered
Systems of
Support Guide

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White Papers

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Case Studies

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ESSA Tier 4
Evidence

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White Papers

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ACTFL-Aligned
Documents
(coming soon)

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Correlations to
State Standards

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Spotlight: Featured Research

Our REPORTEROS and REPORTERS FRANCOPHONES program meets ESSA Tier 4 criteria, validated by a rigorous research analysis conducted by the Johns Hopkins University School of Education and based on a thorough review of our instructional materials. We proudly offer a program built on a well-defined logic model that ensures quality and effectiveness in language education. Read the complete report by clicking the button below!

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Testimonials: Classroom Success

There is no need to think over the “what if’s.” What if students finish early? What if the students don’t connect with the topic? What if there’s an extra explanation needed? Many activities in [REPORTEROS] help in any of these cases and help the class flow, and students can have a palpable sense of moving forward with their skills.
Tatiana Alarcón
Tatiana AlarcónSalem Academy
Since implementing PROYECTOS, there has been a noticeable increase in student engagement and learning outcomes. Students demonstrate increased confidence in communicating in Spanish, both orally and in writing, and they feel more prepared to face real-life situations where they need to use Spanish, whether in academic, professional, or social contexts.
Mili Paredes
Mili ParedesDavidson College
I've found REPORTEROS to be an effective and practical textbook for my teaching. It brings real-world context into the exercises, ensuring that students stay engaged and connected to the practical applications of language learning. The focus is on fostering communication while incorporating grammar and vocabulary.
Diego Fernández
Diego FernándezThe American International School of Vilnius
By incorporating real-life tasks into the learning process, such as shopping at a market or describing a neighborhood or apartment where students live or would like to live in the future, [AULA EN ACCIÓN] has successfully bridged the gap between classroom learning and practical application.
Irena Čajková
Irena Čajková The University of Chicago
[DÉFI FRANCOPHONE] was simply an adequate reflection of the way I wanted to teach languages. It places a lot of emphasis on communication in a natural way to teach the language and to learn the language.
Max Leconte
Max Leconte Trinity University
We love the fact that there is no English in NETZWERK NEU. Students were unsettled about that [but] the lack of English makes coming to class necessary. They need to be in class so that they can be taught, but it also has support for students at home.
Fatima Baig
Fatima BaigRice University
Introducing ALBA Y GAEL brought structure and consistency to my classes, making teaching elementary students more effective.
Mary Nieves Ruiz
Mary Nieves Ruiz Meridian Public School
MAPAS opened doors to 21st-century resources, authentic videos, interactive exercises, online discussions, and multimedia materials that help with diverse learning styles and interests. Also allowed students to explore various accents, cultural differences, and authentic language use, preparing students for real-world communication.
Magnolia Inmon
Magnolia InmonIdeaventions Academy
KLASSE! helps me in the preparation of my lessons. It is a great base to build your curriculum on. Students also enjoy reading about contemporary issues, YouTubers, etc., that are mentioned in the book.
Karin Albrecht
Karin Albrecht Elder High School
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