Lessaro

Research

The sources behind every Lessaro lesson.

Lessaro doesn't invent pedagogy. It draws on a curated corpus of authoritative, publicly-available education research. When you click Generate, relevant passages from these sources inform every Bell Work, Hook, Process, Exit Ticket, Homework, and Worksheet.

Authoritative

Every source is published by a government agency, university research center, or peer-reviewed venue.

Openly licensed

Public domain or Creative Commons. Legal, transparent, and freely verifiable. No scraped or proprietary content.

Applied, not quoted

Passages inform the reasoning. Outputs are original and classroom-ready. Lessaro synthesizes, never copies.

Current corpus.

9 sources

  • ACTFL Performance Descriptors for Language Learners

    American Council on the Teaching of Foreign Languages (ACTFL) · 2015
    Custom

    ACTFL Performance Descriptors define what language learners can do at each proficiency level (Novice, Intermediate, Advanced) across the three modes of communication (interpersonal, interpretive, presentational). Used in PROSLA-shaped lessons to calibrate can-do statements and proficiency-level targets. Custom license: free for educational use; verify ACTFL's current terms before redistributing.

  • ACTFL Proficiency Guidelines

    American Council on the Teaching of Foreign Languages (ACTFL) · 2012
    Custom

    ACTFL Proficiency Guidelines describe what learners can do across speaking, writing, listening, and reading at five major proficiency levels. The reference standard for measuring language proficiency in US world-language education. Custom license: free for educational use; verify ACTFL's current terms before redistributing.

  • Foreign Languages and Higher Education: New Structures for a Changed World

    Center for Open Educational Resources and Language Learning (COERLL), University of Texas at Austin · 2020
    CC BY

    COERLL practitioner-facing publication on language teaching frameworks, open-educational-resource pedagogy, and proficiency-oriented instruction. Specifically licensed CC-BY for ingestion and synthesis. PLACEHOLDER: replace with the specific COERLL brief you choose to ingest.

  • Foundational Skills to Support Reading for Understanding in Kindergarten Through 3rd Grade

    Institute of Education Sciences (IES) · 2016
    Public Domain

    IES Practice Guide on the building blocks of reading: phonological awareness, decoding, vocabulary, and connected text for emergent and early readers.

  • Improving Mathematical Problem Solving in Grades 4 Through 8

    Institute of Education Sciences (IES) · 2012
    Public Domain

    IES Practice Guide on teaching mathematical problem solving — representations, worked examples, student explanations, and monitoring progress.

  • Organizing Instruction and Study to Improve Student Learning

    Institute of Education Sciences (IES) · 2007
    Public Domain

    IES Practice Guide on evidence-based strategies for structuring instruction: spacing study, mixing examples, worked examples, and use of abstract and concrete representations.

  • Strategies for Improving Second Language Acquisition in the Classroom

    Center for Advanced Research on Language Acquisition (CARLA), University of Minnesota · 2022
    Custom

    CARLA practitioner working paper on classroom-level second-language acquisition strategies. Custom license per individual paper; verify before redistributing. PLACEHOLDER: replace with the specific CARLA paper you choose to ingest.

  • Teaching Secondary Students to Write Effectively

    Institute of Education Sciences (IES) · 2016
    Public Domain

    IES Practice Guide on evidence-based writing instruction for grades 6-12: explicit strategies, extended writing tasks, integrating reading and writing.

  • Using Student Achievement Data to Support Instructional Decision Making

    Institute of Education Sciences (IES) · 2009
    Public Domain

    IES Practice Guide on formative assessment, interpreting data, and using evidence to adjust instruction — foundational for exit tickets and responsive teaching.

How retrieval works.

When a teacher generates a lesson or worksheet, Lessaro embeds their learning objective and class context, then retrieves the most semantically relevant passages from this corpus via vector similarity search. Those passages are injected into the generation prompt as domain knowledge, never as verbatim text. The output is Lessaro's own synthesis, grade-calibrated and classroom-ready.

The corpus grows over time. New sources are vetted for authority, license, and pedagogical relevance before ingestion. If you represent a publisher or research body and would like to be included, we welcome the conversation.