How to turn lecture slides and PDFs into study notes

Lecture slides look like notes, but they rarely work as notes. They were made to support someone talking: a few keywords, a diagram, a heading. The explanation that connects them was spoken in the room. Reading slides alone a month later, you see the words but not the reasoning.

Good study notes put that reasoning back. Here is how to get from a folder of slides and PDFs to notes you can actually learn from.

Step 1: Collect everything that belongs together

Gather the material for one topic in one place:

• the lecture slides,
• handouts and worksheets,
• the assigned reading, or the chapter of the textbook,
• your own notes from the lecture, a recording or a voice memo, if you have them,
• photos of the board.

The spoken part is the most valuable addition. It holds the "why" that slides leave out.

Step 2: Decide what the notes are for

Notes for an exam look different from notes for understanding a single chapter. Before you start, write one sentence about the goal, for example "Only chapter 3, for the midterm" or "Explain the formulas step by step". It tells you what to keep and what to leave out, and it stops you from copying everything.

Step 3: Restructure by idea, not by slide

Slides follow the order of the lecture. Notes should follow the logic of the subject. Group what belongs together, even when it was spread over ten slides:

• A heading for each concept, not for each slide.
• Definitions in full sentences, with the exact terms.
• Explanations of why something works or happens, not only that it does.
• Worked examples, with every step, especially in mathematics and the sciences.
• Links between ideas: causes and effects, comparisons, what builds on what.

Step 4: Fill the gaps

Now go through what is missing. A diagram without a caption needs one. A formula without its variables explained needs them. A bullet point that made sense in the lecture but not now needs the sentence that was said around it. This is where your recording or your own lecture notes earn their keep.

Step 5: Compress

Finish with the parts you will use most when revising:

• a short summary at the top,
• a list of key terms,
• a few questions to test yourself with.

If you can answer those questions without looking, the note has done its job.

Doing it with AI

The steps above take an hour or more per lecture by hand. An AI note taker can do the restructuring for you, as long as you give it the right material and a clear goal.

In ClamNotes, you make a note from files in the Create tab. You can add your own files, tell ClamNotes what to focus on, and Claude does the rest:

• What it reads: PDFs, slides (.pptx), documents (.docx), spreadsheets (.xlsx), text files, photos, scanned pages, voice memos and other audio, and video. Up to 20 files for one note.
• Your instructions: optional, in your own words, such as "Only chapter 3" or "Explain the formulas step by step".
• Audio and video are turned into text on your device, and only the text is kept.
• Pages, Keynote and Numbers files may need to be exported as PDF first.

You can also add files while you record a class. The teacher's slides then go into the same note as the lecture itself, which is the best of both: the structure of the slides and the explanations that were said out loud. Notes from files work on every plan, including Free.

Check the result

Whether you write the note yourself or let AI do it, check it before you rely on it:

• Compare formulas, numbers and names with the original slides.
• Make sure nothing the exam needs was left out.
• Read the summary and ask yourself whether it matches what the lecture was really about.

AI can make mistakes, and slides can be wrong too. A few minutes of checking is cheap compared with learning something wrong.

A word on sharing

Lecture slides and readings usually belong to the lecturer or the publisher. Using them for your own study is the point, but sharing the files, or notes that copy them, is a different matter. Keep your notes for yourself and your own revision.