Derive Notes Pty Ltd is a Melbourne, Australia company that makes Derive, the intelligent notebook for STEM with a real-time tutor. Students write maths by hand on an infinite canvas and Derive reads the working as actual maths, checking each line against the one above so mistakes are caught where they happen. A tutor panel beside the page helps with the current step. Derive also turns notes into practice exam questions, runs code cells, annotates PDFs and exports to LaTeX, PDF, PNG and SVG. Available on iPad, iPhone, Mac, Windows and the web.