A growing number of teachers are building lesson slides with AI assistants or simple web tools. Ask a chatbot for a ten-slide introduction to photosynthesis, and you often get a neat HTML page with colorful slides. It looks great in the browser. Then reality hits: the school's interactive whiteboard runs PowerPoint, the learning platform only accepts PPTX uploads, and the substitute teacher next week will not know what to do with an HTML file.

I have helped several colleagues through this, and the process is simpler than it seems.

Step 1: Get the HTML into good shape

AI-generated slides are usually a good start but need some cleanup. Before converting, check that:

Each slide fits on the screen without scrolling.

Text is large enough to read from the back of a classroom. Aim for headings that are visible from ten meters away.

Images actually load. Some AI tools reference placeholder images that do not exist.

Facts are correct.…