Lecture Notes or Textbook Notes? How to Use Both Well

They do different jobs. Treat them differently, then bring them together.

You have a stack of lecture notes and a thick textbook, and they do not quite agree. The lecturer skipped half the chapter, spent twenty minutes on one example, and said “this will come up” about something you cannot find in the book. Which should you study from?

Both, but not in the same way. Lectures and textbooks do different jobs, and the students who do well tend to use each for what it is good at, then merge them. This guide shows how.

What each one is good for

• Lectures. They tell you what your lecturer thinks matters. The emphasis, the examples, the hints, the way the topic is framed. They are also where you can ask questions, and where you hear the “why” spoken aloud.
• Textbooks. They give the full, careful version: complete explanations, worked examples, definitions and diagrams, at your own pace. You can reread a hard paragraph as often as you like.

Lectures give direction. Textbooks give depth. You need both: direction so you know where to spend your time, and depth so you actually understand.

Taking notes in lectures

In the lecture, your job is to catch the main ideas and think, not to transcribe. Use short phrases, your own words, and abbreviations you will understand later. Leave gaps where you miss something, and mark anything confusing with a question mark. Write down anything the lecturer stresses, such as “this is important” or “remember this,” and any example, since examples are often what the exam is built from.

If the lecturer provides slides, do not copy them. You will have them already. Use your time to write what is not on the slide: the explanation, the example, the aside. Our guide on study notes covers the Cornell method, which works well here.

Taking notes from a textbook

A textbook is not meant to be read from page one in a straight line like a story. Work with it.

• Survey first. Look at the headings, summaries and questions at the end. Know where you are heading.
• Turn headings into questions. “Causes of inflation” becomes “What causes inflation?” Read to answer it.
• Read a section, then close the book. Write what you remember in your own words, then check.
• Note the examples and diagrams. One worked example is worth a lot of definition.
• Skip what is not needed. Use the syllabus and your lecturer’s hints to decide what matters.

Merge them into one set

The big mistake is keeping two separate piles that you never combine. Instead, for each topic make one set of notes. A simple way is this:

• Step 1: Start with the lecture notes. They show what your lecturer cares about.
• Step 2: Fill the gaps from the textbook. Add the explanation you missed, the full definition, the diagram.
• Step 3: Resolve differences. If the lecture and the book disagree, ask your lecturer or a classmate. Do not just pick one.
• Step 4: Cut. Remove anything you do not need. Aim for a page or two per topic, not twelve.
• Step 5: Add questions. Write cue questions in the margin so you can test yourself later.

A sample routine for one lecture

• Before, 5 minutes. Skim the headings of the chapter or slides, so you know the shape.
• During. Short notes, questions marked, key examples caught.
• Within 24 hours, 15 minutes. Fix gaps, add cue questions, write a two-line summary.
• Within three days, 30 minutes. Read the relevant textbook sections. Add to your notes what the lecture missed.
• Weekly. Test yourself from the cues, and mark what you miss.

Paper or phone?

Either can work. Writing by hand slows you down enough that you have to pick what matters, which suits fast lectures. Typing or a phone is quicker and easier to search later, but it tempts you to copy word for word. If you type, make yourself write in short phrases and your own words, and keep notifications off. If you write, take a photo of any pages you want to keep, so they are not lost.

Using the textbook’s own tools

Most textbooks have things that save time: chapter summaries, learning objectives at the start, key terms in bold, review questions at the end. Read the objectives and summary first to see what the chapter is for. Use the review questions as free practice, answering them before you read the solutions. They are often closer to exam questions than your own notes are.

What to do when the lecturer is hard to follow

Some lecturers go fast, some mumble, some drift. Do not give up on the lecture, but adjust. Sit near the front if you can. Write keywords and leave gaps instead of freezing. Compare notes with a classmate afterwards. Use the textbook to rebuild the parts you lost, and bring specific questions to the lecturer, which they are usually glad to answer.

What to do when there is no textbook

In many courses, the textbook is expensive or hard to get. Ask the lecturer which chapters matter most, borrow or share a copy, or use the library. Past questions can also show you which ideas matter. Slides and notes from a careful classmate can fill a lot. And you can always ask an AI tutor or a teacher to explain a concept you are stuck on, as long as you check anything important against your course material.

Mistakes to avoid

• Copying the slides in lectures. You already have them. Think instead.
• Reading the whole textbook. Use the syllabus and lectures to choose.
• Keeping two unmatched piles. Merge, or you will revise from neither.
• Highlighting instead of questioning. Questions turn notes into practice.
• Ignoring examples. They often show how the exam will ask.