Learning / BROWSER DEMO

MyGermanBD

MyGermanBD combines beginner German practice with a Germany research workspace. Lessons, vocabulary review, and planning tools use local demo data and do not verify official guidance.

Open browser app

Free to explore · No sign-in · Demonstration data

Actual MyGermanBD demo interface — Actual demo interface. Sample records are fictional.

EXPLORE

What you can try

Work through short lessons, practice questions, and answer explanations.
Review German, English, and Bengali vocabulary with a scheduled word queue.
Bookmark sample research routes, check source details, and export a personal plan.

START HERE

Try it in three steps

Choose a lesson and answer its practice questions to review the explanations.
Open the vocabulary queue and rate each word after recalling its meaning.
Explore a Germany research route, inspect its source status, and save a planning note.

CONTEXT & LIMITS

Know what the demo shows

Lesson completion is not a CEFR assessment, certificate, exam result, or pronunciation grade.
Research records are not independently rechecked and do not establish visa or admission eligibility.
Notes and backups are browser-local and are not encrypted.

Use fictional information when trying inputs. The browser edition has no live service, account, payment, dispatch, or external AI integration. Any local saves belong to this browser and device.

COMMON QUESTIONS

Before you explore

Will MyGermanBD tell me whether I qualify for a visa or university?

No. It does not decide eligibility or submit an application; its research records are illustrative and may be unverified.

Is the progress score an official language result?

No. The app records practice activity and vocabulary review, not a certified proficiency score.

Release information

Maintained by Mohammad Rezwan Khan. Browser release updated 2026-09-30. This page describes the shipped browser demo; it is not a claim of professional or production validation.

Machine-readable app facts · Plain-text overview · Dependency & content notices

Source revision 7d1bc5e78b3f · Runtime SHA-256 b0d229fb87918983

MATHEMATICAL SPECIFICATION & UNITS

Governing Equations, Inputs, Outputs & Dimensional Conventions

MyGermanBD executes deterministic client-side calculations in the browser. Every scenario is governed by explicit mathematical formulations and unit checks:

Vocabulary Retention Bucket B_{t+1} = min(B_max, B_t + 1) on exact article + plural recall; reset to B_1 on gender/case mismatch

Declared Units & Arithmetic Conventions: Trilingual vocabulary cards (Deutsch with der/die/das + plural, English, বাংলা); study blocks in minutes/week.

Scope & Operational Boundary: Beginner lessons, German/English/Bangla vocabulary scheduling and study planning. No proficiency certification, verified admission or visa guidance.

Launch Interactive MyGermanBD Runtime → · Read Full Methodology & Validation Notes →

REPRODUCIBLE WORKED EXAMPLE & BENCHMARK TABLE

Verified Case Study & Held-Out Reference Table

Worked Verification Case: Noun Gender & Case Drill: Practicing 'der Fahrplan / die Fahrpläne' (schedule — সময়সূচী) and 'Akkusativ vs. Dativ' prepositions verifies whether the learner recalls both the grammatical gender article and verb-second (V2) word order ('Morgen fahre ich nach Berlin'), logging results in the local study planner.

Reproducible benchmark scenarios shipped in the MyGermanBD browser edition (Synthetic / Precomputed Evidence)
Practice Area	Linguistic Feature	Explanation Languages	Certification Boundary
Noun & Article Deck	der / die / das + Plural forms	Deutsch + English + বাংলা	Independent practice (non-Goethe)
Sentence Structure	V2 Main Clause & Subordinate Verb-Final	Deutsch + English + বাংলা	Sample beginner lessons only
Study Planner	Spaced Review + JSON Backup	Bilingual UI controls	No visa or embassy guidance

PROCEDURAL USAGE GUIDE

How to Use MyGermanBD in 3 Reproducible Steps

Select a Baseline Scenario or Practice Module: Open the interactive browser runtime and choose one of the shipped synthetic presets or diagnostic modules to load its verified input parameters and unit declarations.
Inspect Intermediate Traces & Constraints: Review the computed ledger, error diagnostics (MAE/RMSE/margin/balance checks), or bilingual explanations alongside the governing equations documented on mklearn.co.education/methodology/.
Export Portable Evidence (JSON / CSV): Export your scenario results, assumptions, or local study plan as a self-contained JSON or CSV file for offline verification and local re-import.

FREQUENTLY ASKED QUESTIONS

Methodological & Boundary FAQs

Will MyGermanBD tell me whether I qualify for a visa or university?

No. It does not decide eligibility or submit an application; its research records are illustrative and may be unverified.

Is the progress score an official language result?

No. The app records practice activity and vocabulary review, not a certified proficiency score.

What mathematical model and units does MyGermanBD use?

MyGermanBD applies Vocabulary Retention Bucket B_{t+1} = min(B_max, B_t + 1) on exact article + plural recall; reset to B_1 on gender/case mismatch. Units: Trilingual vocabulary cards (Deutsch with der/die/das + plural, English, বাংলা); study blocks in minutes/week.

What are the operational boundaries and limitations of MyGermanBD?

Beginner lessons, German/English/Bangla vocabulary scheduling and study planning. No proficiency certification, verified admission or visa guidance. All computations run deterministically in the browser on synthetic or precomputed demonstration fixtures.

How can I reproduce the benchmark results in MyGermanBD?

Open the interactive browser workspace at ./run/, select Case 1 to inspect the worked result (Noun Gender & Case Drill: Practicing 'der Fahrplan / die Fahrpläne' (schedule — সময়সূচী) and 'Akkusativ vs. Dativ' prepositions verifies whether the learner recalls both the grammatical gender article and verb-second (V2) word order ('Morgen fahre ich nach Berlin'), logging results in the local study planner.), and export the JSON or CSV evidence ledger.

PROVENANCE, ATTRIBUTION & RESEARCH ECOSYSTEM

Engineering Attribution & Interconnected Research Hub

Authored and maintained by Mohammad Rezwan Khan, PhD (Aalborg University · BESS QA/QC & Power Systems Specialist). Canonical URL: https://mklearn.co.education/ · Source revision: 7d1bc5e78b3f · Runtime SHA-256 prefix: b0d229fb87918983 · Repository provenance: https://github.com/mohammadrezwankhan/mygermanbd-demo (private source engine; public deterministic browser projection).

Application Metadata (app.json) · AI / LLM Discovery Guide (llms.txt) · Full Technical Corpus (llms-full.txt) · Semantic Knowledge Graph (knowledge-graph.jsonld)