200 C1 and C2 Advanced English Lesson Resources with Native British
Audio, Speech & Acoustic Datasets
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$2,999
About
A teacher-authored English language teaching dataset covering the two advanced CEFR levels, C1 and C2. It contains 200 lessons (100 per level, organised into 10 courses per level) with aligned native British English audio, plus an overview for each level and a high-level overview of the full corpus.
The lessons come from a 600-lesson A1 to C2 corpus written and recorded by a single author for The English Classroom, a teaching platform used by 7,000+ registered teachers in 80+ countries, including a UNRWA deployment. Each lesson is mapped to both a CEFR level and one of the UN Sustainable Development Goals, so the content is consistently levelled and tied to themes. Structured, teacher-written material at C1 and C2 is harder to find than beginner content, and this bundle covers the upper end of proficiency, where nuance, register and idiom matter most. The rights position is clean: one author, no third-party material, and all rights held by The English Classroom AB.
Data Product Features
- CEFR level: every lesson is tagged C1 or C2
- Course structure: 20 courses in total (10 per level), each with sequenced lessons
- SDG theme: each lesson is mapped to one of the UN Sustainable Development Goals
- Lesson slides: instructional content written for advanced learners, covering nuance, register and idiomatic language
- Teacher notes: a separate document for each lesson, keyed to slide numbers, in the same format across all 200 lessons
- Audio: native British English clips aligned to individual slides
- Activity types: a range of classroom activities within each lesson
- Level overviews: one overview document each for C1 and C2, summarising courses, lessons and progression
- Corpus overview: a high-level document describing the full A1 to C2 corpus
Distribution
The data product is delivered as lesson PDFs, SCORM packages (slides with per-slide audio), teacher-note PDFs and overview documents, organised by level, course and lesson. The audio is compressed as delivered within the lesson packages, and no uncompressed master recordings exist. Delivery is arranged after licence agreement, and a sample is available on request.
- Data Volume: 200 lessons (one record per lesson), 20 courses, 2 CEFR levels, 1000 audio clips, 2 level overviews and 1 corpus overview, approx. 0.7 GB
Usage
This data product is ideal for a variety of applications:
- LLM fine-tuning for advanced learners: training models to produce or assess English at C1 or C2
- Proficiency classification: labelled examples for detecting advanced-level text and separating C1 from C2
- Educational content generation: reference material for AI tutors, academic and professional English tools, and lesson-authoring
- Text-audio alignment: pairing complex lesson content with native-speaker audio for advanced listening tasks and ASR evaluation
Coverage
The dataset covers the full advanced band of the CEFR, up to near-native proficiency.
- Geographic Coverage: Global. The content is in British English and is used in teaching in 80+ countries.
- Time Range: 2019 - 2020
- Demographics: written for advanced and proficient learners of English as a second or foreign language. All audio is by one adult native British English speaker.
License
Non-exclusive commercial licence. Contact us for terms and pricing. All rights are held by The English Classroom AB.
AI Training Rights
Licensee is granted a non-exclusive, worldwide right, for the term agreed in the licence, to:
- Use the Data Product to train, fine-tune and evaluate machine learning models, including large language models.
- Incorporate Data Product content into models and commercialise resulting model outputs.
- Create derivative works (model weights, embeddings, etc.) for any lawful purpose not excluded below.
Restrictions:
- The audio may not be used for voice cloning, text-to-speech, speech synthesis, or training any model to imitate the speaker's voice.
- The Data Product itself may not be sold, redistributed or shared outside of licensed usage.
- Models may not be used to reproduce substantial portions of the lessons verbatim.
- Licensee must comply with all applicable laws, including data protection and privacy regulations.
Who Can Use It
- AI labs and model developers: fine-tuning and evaluating models on advanced, nuanced English and fine-grained level assessment.
- EdTech companies: building AI tutors and tools for academic, professional and pre-university English.
- Researchers: applied linguistics, advanced proficiency and language assessment studies.
- Speech and ASR teams: evaluating recognition and comprehension against natural-pace, advanced native-speaker audio (synthesis and voice cloning excluded).
Data Dictionary
| Column Name | Data Type | Description | Possible Values/Notes |
|---|---|---|---|
| cefr_level | String | CEFR proficiency level of the lesson | C1, C2 |
| course_title | String | Course the lesson belongs to | 10 courses per level |
| lesson_number | Integer | Position of the lesson within its course | Sequential |
| lesson_title | String | Title of the lesson | Free text |
| sdg_theme | String | UN Sustainable Development Goal the lesson maps to | SDG 1–17 |
| slides | Document | Lesson slide content | PDF and SCORM |
| teacher_notes | Document | Presenter notes keyed to slide numbers | PDF, consistent format |
| audio | Audio | Native British English clips aligned to slides | Compressed, within SCORM packages |
| activity_type | String | Classroom activity used on a slide or section | Varies by lesson |
| level_overview | Document | Summary of courses, lessons and progression for one CEFR level | 2 documents (C1, C2) |
| corpus_overview | Document | High-level description of the full corpus | 1 document |
All content was written and recorded by one person, so style, levelling and teacher-note format are consistent across every lesson. Buyers can review the level overviews and corpus overview before licensing, and a sample lesson from each level is available on request. The A1 and A2 and B1 and B2 bundles, and the full 600-lesson corpus, are also available.
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