Stella Academy: Interactive Learning Set Against the Story of Space

Stella Academy is a free learning site with 31 interactive lessons for ages 9 to 18, set against the story of space exploration.

Rather than dry revision checklists, Stella's journey (/journey) organises topics into five space missions—from key stage 2 through to GCSE and A-level—linked directly to UK Department for Education curriculum statements. There are no accounts or login walls; progress saves in the browser.

Dropping the AI Chat Tutor

The project began at a hackathon as an AI tutor with a sign-in wall and a chat window. In practice, waiting for a chatbot to type out paragraphs of prose did very little to help anyone learn, and language models occasionally invent steps in their working while sounding completely confident.

I stripped out the login wall and the chatbot altogether. Instead, each lesson combines NASA mission footage with interactive browser controls, a worked example, a three-round practice quiz that marks each step of your working, and a /lab workbench for exploring the mission models directly.

Why Human Review Still Matters

Although the live site does not use a chatbot, the first drafts of the lesson notes were written with AI assistance. Going through all 31 lessons line by line before launch turned up typical generator mistakes: American school terms and imperial units creeping into a UK site, dollar signs breaking the page layout, and explanations that sounded plausible at a glance but missed the mark.

Fixing those by hand—and adding automated checks plus a volunteer teacher review workflow (/help)—was a good reminder that AI can speed up a first draft, but educational material still needs careful human checking before you put it in front of students.