English Placement Test

AI-powered adaptive assessment accurately evaluating English proficiency across all CEFR levels in under 30 minutes.

01 — Problem

The English Learning Dilemma

Students starting Platzi's English Academy didn't know where to begin and often abandoned their learning journey.

Unclear Starting Point

Students couldn't accurately self-assess their English level, leading to frustration when courses were too advanced or too basic for their abilities.

No Personalized Guidance

Without proper assessment, students lacked personalized learning paths, making it difficult to progress systematically through the curriculum.

High Drop-off Rates

Students who couldn't find appropriate content quickly disengaged, resulting in poor completion rates and low satisfaction with the English Academy.

02 — Solution

Computerized Adaptive Testing

An intelligent assessment system that adapts questions based on user responses.

Adaptive Question Flow

Questions adapt to responses, ensuring efficient, accurate assessment without unnecessary levels.

Multi-Competency Evaluation

Comprehensive testing across all skills aligned with CEFR framework standards.

AI Speech Assessment

Advanced pronunciation evaluation measuring fluency, completeness, and prosody.

Quick Results

Complete assessment in under 30 minutes with immediate CEFR level placement (A1-C1).

Personalized Learning Path

Automatic generation of customized course sequences based on identified level and skill gaps.

Enterprise Ready

Scalable for both individual learners and companies assessing employee English proficiency at scale.

03 — How It Works

Adaptive Assessment System

The test uses an adaptive algorithm with a curated question bank.

Assessment Flow

Test Introduction

Students self-select their perceived proficiency level to establish the starting point for adaptive questioning.

Test introduction interface

Multi-Competency Questions

Students answer questions testing grammar, speaking, listening, writing, and reading skills. The interface adapts to each question type.

Multi-competency question interface

AI Speech Evaluation

For speaking questions, advanced AI evaluates pronunciation in real-time, measuring fluency (natural flow), completeness (accuracy), and prosody (expressiveness).

AI speech evaluation interface

Adaptive Difficulty

The algorithm continuously adjusts question difficulty based on performance. Correct answers advance students to harder questions, while incorrect answers provide easier ones.

Adaptive difficulty progress

Results & Recommendations

Students receive immediate CEFR level placement with a personalized learning path tailored to their specific level and skill gaps.

CEFR results and recommendations
04 — Impact

Measurable Success

The placement test transformed English Academy onboarding and became a valuable tool for enterprise customers assessing employee proficiency.

200K+
Individual students assessed
500+
Companies using the test
2x
Increase in student registration after testing
2x
More classes viewed post-assessment
05 — Key Learnings

What I Learned Building This

Academic Rigor Matters

Research-backed assessment using CEFR standards built credibility and trust with users and companies.

Adaptive > Comprehensive

Adaptive testing gave faster, more accurate results while boosting user experience and completion.

Immediate Value Drives Engagement

Instant results with personalized recommendations converted passive browsers into active learners.

B2C Success Unlocks B2B

A great consumer experience attracted enterprises who adopted the tool for employee evaluation.