The PDF Annotation Tools Teachers Actually Use in Class
Most marketing for a PDF annotation tool for teachers shows someone scribbling on a document alone at a desk. That is not teaching. When you are live in front of a class, you need the writing on the PDF to appear on every pupil's screen at the same time, you need everyone looking at the same page, and you need it big enough to read from the back. This is a teacher-to-teacher look at what actually matters when the annotation happens in a real lesson.
What a generic markup app misses in a live lesson
A standard PDF markup app lets you draw, highlight and save. That is fine for prep. The moment you are teaching, three things break: your pupils cannot see what you are writing in real time, half of them have drifted to a different page, and the marks live in a file nobody else has open.
ClassKite was built for the live case. You upload a PDF — a worksheet, a past paper, a set of slides — and teach from it on the smart board with live pen annotation streamed to every student device. The ink uses pressure and calligraphy strokes, and the document scrolls in one continuous vertical view, so you are not fighting page-by-page jumps mid-explanation. There is more on this in our piece on teaching from your PDFs on an interactive whiteboard.
The features that earn their place in the classroom
- Streamed annotation — what you draw on the board appears on pupils' screens as you draw it, so they follow your working, not just the finished answer.
- Follow-me page sync — turn the page and every screen turns with you. No more "I'm on question four, sir."
- Full-screen present mode — strip the interface away so the page fills the board.
- Pressure and calligraphy ink with continuous scroll — and these are available on the free Teacher Basic plan.
Pair this with smart board teaching and the annotation stops being decoration; it becomes the lesson. You can read the wider workflow in our complete teacher guide.
Turn the same pages into practice
The part a markup app cannot do: once you have taught from the PDF, you can turn the same material into questions. Build them by hand, bulk-import the Question Bank spreadsheet, or have ClassKite's AI draft questions for you to review and approve — note the AI drafts questions only and does not read the PDF's contents. Run them as live practice or self-paced, and objective answers auto-mark the moment a pupil submits. Pupils join free with a class code in their browser, no app or paid account needed. Our walkthrough on creating digital practice from a PDF takes it step by step.
Start teaching from your PDFs free — upload a document and write on it live in a few minutes.
Frequently asked questions
Do my pupils see my annotations as I write them?
Yes. Your pen strokes stream live to every joined student device, and follow-me page sync keeps each screen on the page you are teaching from.
Is live PDF annotation free?
Yes. PDF annotation and smart board teaching — including pressure ink and continuous scroll — are on the free Teacher Basic plan, with limits of 25 pages and 512 KB per PDF. Larger files and class analytics come with Teacher Plus and the School Plan.
Does ClassKite mark the questions for me?
Objective question types — multiple choice, fill-in-the-blank, true/false, matching and more — auto-mark on submit. There is no gradebook; ClassKite gives you per-session and per-student reports instead.
Related reading: Interactive whiteboard: teach from your PDFs, How to create digital practice from a PDF, and our PDF annotation feature page.