How to Chunk Training Materials


How to Chunk Training Materials Image

If you want to know how to create more effective training materials, you need to know how to chunk training materials. And YES, chunking is the accepted term in the field, even if it does sound a bit strange.

Chunking is the process of breaking down instructional materials into smaller, "bite-sized" pieces and then arranging them in a sequence that makes it easier for your learners to learn the material.

In this post, we'll:

  • Explain the four steps necessary for a person to remember something
  • Explain why limits of the working memory cause us to use chunking
  • Explain what chunking is
  • Give tips for chunk length for novice and expert learners
  • Give tips for organizing the chunks in your training materials
  • Provide some sources and useful resources for chunking

But, before we do all that, we're going to take a step back and explain why you should care about this.

Creating Training Based On How People Learn

So why should you care about chunking? Because when you're creating training materials, your goal should be to create training materials based on an informed understanding of how people learn. And as you'll see below, presenting materials in chunks takes advantage of some unique aspects of how people learn.

How People Learn: Four Steps of Learning

We're going to keep this explanation short (you can read a longer version here), but learning involves taking sensory input from the outside world and moving it through three different structures of our memory system. Let's look at the whole process.

  1. Sensory Input from the Outside World: This is everything going on around you while training is occurring. It includes the actual training materials but lots of other things too--the room temperature, the chirping birds outside the window, etc.
  2. Sensory Memory: Information from the outside world floods your sensory memory, but it lasts for only a brief period of time and most doesn't gain your conscious attention.
  3. Working Memory: A fraction of the information from your sensory memory advances to your working memory. This is information that you are aware of and that your brain is actively "working on." The hitch is that your working memory can work on only a small number of things at one time (around four) and it can hold information for only a short period of time (about ten seconds).
  4. Long-Term Memory: Some, but not all, of the information from your working memory will then be transferred to your long-term memory. This process is called encoding. It seems that the long-term memory is essentially limitless-there are no limits to the number of things it can store or how long it can store them. Information in the long-term memory is "packed away" in structures called schemas. Once information is in the long-term memory, it can later be retrieved when needed. At that point, it returns from the long-term memory to the working memory.

Working Memory-The Bottleneck In Our Memory System

So working memory is the "bottleneck" in our learning process. It can't hold a lot of information, and it can only hold that information for a short period of time. It's easy to overwhelm the working memory--give it too much information, and the working memory simply loses some of it. It's just gone. This is known as cognitive overload. And if you overwhelm the working memory, that information has no chance to make it into the long-term memory and later be retrieved and used.

And that, my friend, is where chunking comes in. We chunk training material because we know how the human brain processes information during training and we don't want to overload the working memory. Chunking is intended to avoid overwhelming the working memory. It also plays a role in helping to encode the schemas in the long-term memory.

The Two Components of Chunking Training Materials

A simple definition of chunking is that it's taking information and breaking it down into small little pieces. But it's also important to remember that you'll then arrange those little chunks into some organized training sequence for your learner.

So, you can think of chunking as a two-stage process in which the person designing training materials:

  1. Breaks the information down into small little bits that can be processed by the working memory
  2. Organizes those bits in some form of logical manner that make it easier for the trainee to process and encode the information into long-term memory

With that in mind, let's go over some tips about the size of your chunks and the order you present them in.

Chunking for Novices and for Experts on a Topic: The Length of the Chunk

As you probably know, before you design and create training, you should learn some things about the specific learners the training is intended for. That will let you design training that's better suited for their learning needs. And one of the most important things you can learn is their existing knowledge in the topic. In particular, it's important to know if they're novices on that topic or if they're well-informed experts on the topic.

Why is that so critical?

You might think it's because experts in a topic can handle more chunks of information about that topic than novices can. But that's not it. Novices and experts have the same working-memory limits-about four chunks.

But what IS different, and what SHOULD influence the design of your training, is the size of those chunks. Novices can work with four small chunks. Experts, on the other hand, can work with four larger chunks.

Why is that? Why can experts work with larger chunks? It's because they have existing schemas in their long-term memory that they can use to "absorb" and make sense of the new information. Those schemas "support" the learning process for the expert in the topic. And, as a training developer, part of your job is to provide what's called "scaffolding" for novice learners who don't have that built-in support from existing knowledge stored in the long-term memory.

How to Chunk Training Materials

1. Start with the "big picture" and work your way down

There's a good chance the learning materials you're creating include more than one activity (or course, or whatever you happen to call it). If so, begin by breaking the entire curriculum into smaller parts. For example, your curriculum might include modules, your modules might include lessons, your lessons might include activities, your activities might include topics, and your topics might include screens (in an elearning context).

The important thing isn't the terms you use for curriculum/module/lesson/activity/screen. What's important is that they're broken down and organized in a logical manner. In some cases, the organizational scheme will be linear because you're creating a linear learning experience for your learner. In other cases, when you're creating training that's non-linear, you may organize in a different way--by concept, for example.

2. Remember to revise your organizational scheme

You may not get this breakdown perfectly the first time. Return and revise it as you learn more. This isn't a failure, it's a success of the process. Training is always about evaluation, revision, and continual improvement.

3. Get rid of the unnecessary stuff

In learning, less is more. While you're still in the design phase, keep an eye out for materials that are unnecessary. And then cut them. It may be difficult to do, but it will create more effective training materials for your learners. Is it unrelated? Is it a "nice to know" or an "interesting fact?" If so, nix it.

4. Analyze your screens (or pages, slides, etc.)

Ultimately, you'll begin designing training for one "moment"--in the context of elearning, you'll be designing your screen. Try to introduce only one idea per screen, and keep it short. Remember what we said earlier about the limits of working memory, and check to make sure you're not piling on too much.

5. Step back and look at the groups of chunks you've created

Are they arranged in a logical order? Are you presenting too many chunks before learners get a chance to practice or take a break? Remember, you've only got about four chunks to work with.

Additional Thoughts: Consolidate Fragments Into Chunks

While developing training, you may discover you've got to include some fragments that aren't truly "chunk-sized." If that's the case, try to find a way to group them into a chunk so they can be memorized in that way instead of individually. You'll have to get creative here--maybe you can create a mnemonic device. I know I still lean heavily on ROY G. BIV when I need to remember the colors of the visible spectrum.

Organizing The Chunks Of Your Training Materials

There are several ways you can organize your chunks. Each can be a good choice depending on the training materials. Here are a few:

1. "Built-in" logical structure or flow

There may be some logical order that comes somewhat "built-in" with the topic. For example, if the training is about the spread of a terrible disease throughout the globe, the training may be structured by geographic region, such as by continent. Or, you might present training about the history of jazz in chronological order, from its New Orleans roots to big band swing, be-bop, free and "out" jazz, and contemporary jazz.

I put inherent structure at the top of this list because one could argue that several of the following items are subsets of inherent structure.

2. Job task performance order/sequence

If you're training someone to perform a job task, it may make sense to order the training in the same order as the learner will perform the task at work. A lot of training for job procedures fits the bill here, as does process training (for example, how a complex machine works).

3. Prerequisites and dependent learning

In many cases, learning will be a step-by-step process in which you learn a prerequisite then learn material that depends on knowing the prerequisite. Want to teach someone to troubleshoot a complex system? It's probably best to begin with training that explains how the system works.

4. Cause and effect

Training for troubleshooting or problem-solving could be organized into a basic cause-effect pattern. You could also imagine customer service training set up on a cause-effect basis, perhaps also organized into "bad effects" and "good effects."

5. Big picture then smaller parts

Start with a big-picture/birds-eye view, then "drill down" into the smaller parts. I do this a lot when I work with new customers who are implementing one of the Convergence Training learning management systems. First I give an overview of the system, then we learn how they'll use the various parts to enter their workers, import and create training materials, make assignments, and so on.

6. Return and repeat

This can be useful during lengthy trainings--it's probably better for a "curriculum" than a single "activity." The idea is early in the training, you introduce a concept. Then, as the training progresses from module to module, you continue returning to that concept, learning about it in deeper, richer, more intricate ways.

This article on spaced practice and this interview with Dr. Will Thalheimer on spaced practice go into this more deeply.

7. Simple to complex

If there's no real dependent learning order (see #3, above), you may choose to present simple materials before you present harder materials. I did this when explaining how football works to my fiancee (who was born and raised in Singapore and knows nothing of American football). We talked about offense, defense, and scoring before we got into the complexities of zone defense. (Note: she still has no interest in American football.)

8. Known to unknown

Learning theory tells us that learners relate new information to existing information, and one of Gagne's Nine Events of Instruction is to activate prior knowledge. So it makes sense to ground things by talking about the "knowns" before venturing off into the "unknowns."

9. Categorize

This can be useful if there's no real inherent structure of your training materials. For example, the Convergence Training Knowledge Base, where our existing customers can go to learn more about our learning management systems, is organized in a "flat" list of categories--Personnel, Training Materials, Assignments, Crediting Training, Reports, and so on.

10. Alphabetical

This is commonly used in glossaries, software helpful files, and similar contexts, though it's probably not as great for job training. It's easy for your learners to quickly understand this organizational scheme and begin selecting the information they need.

11. Order of importance

Depending on your content, putting materials with the most important stuff first, the most important stuff last, or the most important stuff first AND last may suite your needs. This is especially useful if the training topic has no inherent structure.

There are other ways to do this, too. For example, at Connie Malamed's blog post on this topic, one of her readers recommended "spatial" and gave an example of anatomy training. Feel free to list your ideas in the comments section below.

12. Spaced out over time

Don't forget to think of presenting chunks of information over time as well, with an original, primary training followed up with shorter, refresher training sessions.

For more on this, I'll once again recommend this article on spaced practice and this interview with Dr. Will Thalheimer on spaced practice.

Conclusion: Chunking Makes for Better Workforce Training

We hope you found this overview of "chunking" in training helpful. You might also enjoy the following articles along the same lines:

In addition, the following articles on "spaced practice" are related to chunking as well:

Finally, feel free to download the free guide below!

Sources, Acknowledgements, Helpful Resources

We consulted the following resources--plus learned from others in the more distant past--while researching this article. Thanks and credit to them all.

How People Learn

I've read about this many places, but I especially like the way it's covered in the first parts of Connie Malamed's book Visual Language for Designers.

Design for How People Learn

Again, I've read about this in many sources, but a favorite is Julie Dirksen's book Design for How People Learn.

Connie Malamed's blog article 10 Relevant Facts About the Brain gives 10 quick tips on these lines too-with a bit of a focus on how the brain works.


The original theory of "chunking' and the limited capacity of the working memory was created by George Miller in an article titled The Magic Number Seven, Plus or Minus Two. Note that seven has since been reduced to about four.

The following blogs have good thoughts on chunking and ordering chunks:

I picked up the bit about different chunk sizes for novice and expert learners within a given topic from Dr. Ruth Clark's book Building Expertise: Cognitive Methods for Training and Performance Improvement (check out the stuff about the chess players on pages 71-75)



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