Formbar.js is a classroom polling and management system. The two key components are tools for Formative assessment, and a visual representation of the class status, typically a type of visual bar. Formbar was written in Python to run on a Raspberry Pi. Formbar.js is a rewrite in JavaScript, and is designed to be platform-agnostic by way of nodeJS. The tertirary feature is to provide technically-minded students a means of writing interactive software to interact with the classroom management.