Augmenting Human Teaching with AI

Preply, a global language learning marketplace, uses AI to handle the repetitive administrative burden of tutoring—such as lesson planning and note-taking—allowing human tutors to focus on motivation, cultural nuance, and engagement. The core feature, "Lesson Insights," uses the OpenAI API to analyze lesson transcripts and generate structured feedback on grammar, vocabulary, and pronunciation. This feedback is delivered to students immediately after sessions, creating a continuous, compounding learning loop rather than treating lessons as isolated events.

Operationalizing AI at Scale

Preply’s success stems from treating AI as a cultural transformation rather than a simple feature rollout. Key operational strategies included:

• Internal Enablement: By deploying ChatGPT Enterprise and conducting company-wide training, Preply increased weekly active usage among employees from 60% to 95%.
• Engineering Efficiency: Approximately 94% of Preply engineers use Codex for code generation, PR reviews, and debugging, which allows the team to prioritize high-level architecture and product innovation over routine coding tasks.
• Strategic Focus: The company prioritizes deep investment in a small number of high-impact features (like Lesson Insights) rather than broad, shallow experimentation.

Measurable Impact and Future Vision

The implementation of AI-driven insights has yielded significant metrics, including a 4.7/5 satisfaction rating from over 300,000 user reviews and a 70% product-market fit score. Notably, 75% of active learners continue to engage with these AI-generated insights more than a year after adoption, signaling long-term value. Moving forward, Preply intends to evolve these insights into a fully adaptive curriculum that tracks individual learner progress, goals, and preferences over months of study, further cementing the role of AI as a "copilot" for human-led education.