Working memory is the ability to hold a small amount of information in your mind and use it for a short time to complete a task. It is like a mental sticky note or workspace. You use working memory when you remember a phone number long enough to dial it, follow a set of directions, or solve a math problem in your head. Working memory is one of the core executive functioning skills, and it plays a big role in learning.
What is working memory?
Psychologists describe working memory as a limited mental system that both stores and processes information at the same time. The key word is "working." It is not only about remembering something; it is about doing something with that information while you keep it in mind.
Working memory has limited capacity. Most people can only hold a few pieces of information at once, and that information fades quickly if it is not used or repeated. Children have a smaller working memory capacity than adults. It grows steadily through childhood and into the teen years.
How working memory works: the Baddeley and Hitch model
In psychology, the most widely used explanation comes from Alan Baddeley and Graham Hitch, who proposed their working memory model in 1974. It describes several components that process information together:
- Phonological loop: temporarily holds verbal and auditory information, such as words, numbers, or a phone number you keep repeating to yourself.
- Visuospatial sketchpad: holds visual and spatial information, such as shapes, pictures, and where things are.
- Central executive: the attentional control system. It decides what to focus on, blocks distraction, and coordinates the other parts.
- Episodic buffer: added by Baddeley in 2000, it links information from the other parts and from long-term memory into one scene or event.
Working memory capacity and learning
Working memory capacity is the amount of information a person can hold and work with at one time. There are clear individual differences in working memory capacity, even among children the same age. Research in cognitive psychology has found that working memory is closely correlated with fluid intelligence, the ability to reason and solve new problems, and with attention control. Studies also show that working memory in early grades is a predictor of later reading and math skills. A child with low working memory capacity is more likely to lose track during complex tasks, while a child with high working memory can juggle more steps without extra effort.
Working memory vs. short-term memory vs. long-term memory
These terms are related but not the same:
- Short-term memory holds information briefly without changing it. Repeating a list of numbers in the same order is a short-term memory task.
- Working memory holds information and works with it. Repeating the same list of numbers backward, or adding them in your head, is a working memory task.
- Long-term memory stores information for days, years, or a lifetime, such as math facts, sight words, or your address.
Working memory and long-term memory work closely together. Working memory pulls knowledge from long-term memory and combines it with new information to solve problems. When facts are learned well enough to be recalled automatically, less working memory is needed, which frees up space for harder thinking.
Working memory examples in school
Students rely on working memory all day. Some common examples include:
- Following directions: "Put away your books, get out a pencil, and turn to page 42."
- Mental math: carrying a number while adding the next column.
- Reading comprehension: remembering the start of a sentence or paragraph while reading the end.
- Decoding: holding the sounds of letters in mind while blending them into a word, a skill tied to phonological awareness and decoding.
- Writing: keeping an idea in mind while thinking about spelling, grammar, and handwriting.
- Taking notes: listening to the teacher while writing down what was just said.
Signs of a working memory deficit in children
A working memory deficit means a child can hold and use less information at once than most children the same age. It is not a lack of effort or intelligence. Signs may include:
- Forgetting multi-step directions partway through
- Losing track of what they were doing in the middle of a task
- Trouble with mental math and multi-step word problems
- Rereading passages because they forgot what they just read
- Leaving out words or letters when writing
- Seeming inattentive or "spacey" in class
- Difficulty joining conversations or group work
Weak working memory is common in children with ADHD and with specific learning disabilities such as dyslexia and dyscalculia. It can also be seen after a brain injury or with language disorders. Because the signs look like attention problems, working memory issues are sometimes mistaken for not listening or not trying.
How is working memory measured?
Working memory is often assessed as part of a psychoeducational evaluation. Many cognitive tests include working memory tasks. For example, the Wechsler Intelligence Scale for Children (WISC) includes a Working Memory Index. Tasks in this area may ask a child to repeat a string of digits in order or backward (digit span), or to remember a sequence of pictures. Scores are compared with those of other children the same age.
Evaluators may also use rating scales completed by parents and teachers, along with classroom observations, to see how working memory affects daily learning. A single low score does not diagnose a disability by itself. The results are one piece of the full picture the evaluation team uses under the IDEA. You can read more about these tests in our entry on IQ testing.
Strategies and accommodations for working memory
Research has not shown that computer "brain training" games reliably improve school performance, so most experts focus on reducing the load on working memory and teaching students ways to work around it. Helpful strategies include:
- Give directions one or two steps at a time and post them in writing
- Ask the student to repeat directions back in their own words
- Provide checklists, anchor charts, and reference sheets
- Use graphic organizers to plan writing
- Allow math fact charts or calculators when the goal is problem solving, not fact recall
- Use manipulatives and visuals to make ideas concrete
- Provide copies of notes or guided notes
- Build automatic skills, such as fluent reading of sight words, so less memory is needed
- Teach memory strategies such as chunking (grouping items, like the digits of a phone number), rehearsal and repetition, and mnemonics
- Reduce distraction in the room so attention can stay on the task
These supports can be written into a student's IEP or 504 plan as accommodations. At home, parents can help by keeping routines predictable, using visual reminders, and giving one instruction at a time.
Frequently asked questions about working memory
What is an example of working memory?
Doing a math problem in your head is a classic example. To solve 23 + 18 mentally, you must hold both numbers, add the ones, remember the carried digit, and then add the tens.
Is working memory the same as short-term memory?
Not exactly. Short-term memory only holds information for a short time. Working memory holds it and lets you use or change it, such as reordering, comparing, or calculating.
Can people with ADHD improve working memory?
ADHD treatment, including medication for some people, may help attention, and strategies can reduce the load on working memory. Studies of computer training programs show gains on practiced tasks, but these gains often do not carry over to schoolwork. Talk with your child's doctor or school team about options.
Is poor working memory a learning disability?
A working memory weakness is not a disability category by itself under the IDEA. However, it often appears with conditions such as ADHD, dyslexia, and dyscalculia, and it can be one reason a student struggles and needs support.
Can working memory be improved in children?
Working memory capacity grows naturally as children get older. Strategies like chunking and rehearsal, plus classroom supports, help students use the capacity they have more effectively.
