How NoRedInk Used PromptLayer Evals to Deliver 1M+ Trustworthy Student Grades

NoRedInk, an educational technology company, embarked on a journey to create an AI grading assistant capable of providing pedagogically sound and trustworthy feedback, serving 60% of U.S. school districts and millions of students globally. Facing challenges typical in EdTech, they transitioned from manual scripts to a scalable, data-driven evaluation pipeline by leveraging PromptLayer, which allowed for collaborative workflows and robust evaluation capabilities. This transformation enabled NoRedInk to generate over 1 million pieces of feedback with increased efficiency and accuracy. Crucially, the integration of non-technical Curriculum Designers, former educators with deep pedagogical expertise, into the development process through PromptLayer's Playground empowered them to experiment with prompt-level changes without needing coding skills. This shift significantly reduced feedback loops and enhanced the AI’s ability to provide detailed, contextually relevant feedback, aligning with their educational mission. The successful integration of PromptLayer not only improved internal confidence and efficiency but also resulted in a 12 percentage point increase in evaluation rubric pass rates, demonstrating the potential of combining technical infrastructure with domain expertise in creating effective AI solutions for education.