Piaget's Stages of Development: Chart, Examples, and Classroom Applications

Piaget's stages of cognitive development describe how children build logical thinking from birth through adolescence across four sequential stages: sensorimotor, preoperational, concrete operational, and formal operational. Swiss psychologist Jean Piaget developed this theory after observing that children's minds work fundamentally differently from adult minds—not just as smaller versions of adult thinking, but as structurally distinct ways of understanding the world.

Early childhood educators can use Piaget's stages of development to gain insight into how children learn at different points in their growth. These insights can help you build a curriculum informed by how children understand their environment at each developmental stage.

Read on to learn more about Piaget's four stages of cognitive development and how to apply this theory in an early education setting.

Table of contents

• What is Piaget's theory of cognitive development?
• The four stages of Piaget's cognitive development theory
  • Sensorimotor stage (birth to two years)
  • Preoperational stage (two to seven years)
  • Concrete operational stage (seven to eleven years)
  • Formal operational stage (12 years and up)
• How to apply Piaget's stages of development in early childhood education
• Criticisms of Piaget's theory
• Frequently asked questions

What is Piaget's theory of cognitive development?

Piaget’s theory centers on how children learn and gradually develop logical thinking. The theory states that children's understanding of their environment increases over time, and that cognitive development unfolds across four stages from birth to adolescence:

• Stage 1: The sensorimotor stage (birth to two years old)
• Stage 2: The preoperational stage (two to seven years old)
• Stage 3: The concrete operational stage (seven to eleven years old)
• Stage 4: The formal operational stage (twelve years old and up)

Piaget's cognitive development theory gives early childhood educators a roadmap to track children's cognitive progress. Each stage includes milestones children should reach before moving forward.

By tracking progress through each stage, educators can assess cognitive development and adjust their curriculum to provide extra support to children who are struggling to reach certain milestones.

The four stages of Piaget's cognitive development theory

Piaget's cognitive development stages roughly correlate with childhood age periods. Piaget believed that the developmental stages always happen in the same order, that no stage is ever skipped, and that each stage builds on the one before it.

Sensorimotor stage (birth to two years)

The sensorimotor stage is the first of Piaget's stages of development. It lasts from birth until a child is about two years old. During this stage, children depend on their senses to learn about the world. The primary developmental goal is for children to develop object permanence—the understanding that objects continue to exist even when they can't be seen.

Major characteristics and developmental changes of the sensorimotor stage:

• Children learn about themselves and their environment through seeing, touching, sucking, and feeling.
• Children develop an understanding of cause and effect.
• Children recognize that they're separate from the people and objects around them.
• Children develop object permanence.

The sensorimotor stage has six sub-stages:

• Reflex actions: In the first month, infants develop reflex actions such as sucking and grasping. These instinctive responses help infants survive and gradually disappear as the child matures and gains muscle control.
• Primary circular reactions: Within the first four months, infants begin to intentionally wiggle their fingers, kick their legs, and suck their thumbs.
• Secondary circular reactions: From four to eight months, infants interact with the external world and repeat pleasurable actions with objects, such as continuously shaking a rattle to hear the sound it makes.
• Coordinating secondary schemes: From eight months to one year, infants show interest in objects and use what they've already learned to reach their goals—for example, moving an object that blocks something they want.
• Tertiary circular reactions: From 12 to 18 months, toddlers explore the world through trial and error. They may take things apart and put them back together repeatedly to observe what happens each time.
• Symbolic thought: In the final sub-stage (18 months to two years), imaginative play typically begins and vocabulary expands significantly. Children may ask short questions or make requests using one or two words. They also start to understand that symbols can represent objects.

Preoperational stage (two to seven years)

The preoperational stage is the second of Piaget's stages of development and lasts from age two to seven. During the preoperational stage, children develop language and begin to engage in abstract thought, but haven't yet started using logic to manipulate information. By the end of this stage, children can use their imagination and engage in make-believe play.

Major characteristics and developmental changes of the preoperational stage:

• Children struggle to see situations from another person's point of view (egocentrism). For example, if a child is looking at a book with a picture of a dog, they might assume that their teacher sitting opposite them sees the same picture, even if that person is looking at the back cover.
• Children have difficulty thinking about multiple aspects of a situation at the same time.
• Around age five, children begin to understand conservation—the idea that a quantity stays the same even if its shape, size, or container changes.
• At the beginning of this stage, children engage in parallel play, playing alongside others without interacting directly.
• As parallel play develops further, children begin including others in games and engage in pretend play, which helps reinforce and solidify new concepts.
• Children believe that humans manufacture certain natural phenomena, such as clouds and rain.
• Children can't reverse a sequence of events back to its starting point.

The preoperational stage has two sub-stages:

• Symbolic function (ages two to four): Children's symbolic thinking develops rapidly. They can mentally represent objects that aren't present and rely heavily on perception to solve problems.
• Intuitive thought (ages four to seven): Children begin to think more intuitively, asking many questions as they try to understand the world around them.

Concrete operational stage (seven to eleven years)

The concrete operational stage is the third of Piaget's stages of development and lasts from age seven to eleven. During this stage, children begin to think logically and rationally about physical objects. By the end of the stage, children can use inductive reasoning to solve problems tied to their own experiences, though they haven't yet developed the ability to solve hypothetical or abstract problems.

Major characteristics and developmental changes of the concrete operational stage:

• Children can identify properties of categories, relate categories to one another, and use categorical information to solve problems. They also understand that categories can contain sub-categories.
• Children understand that quantity stays the same even when appearance changes—for example, that water poured from a tall glass into a shallow dish is still the same amount.
• Children can concentrate on multiple aspects of a situation at the same time.
• Children grasp reversibility—for example, understanding that water can be frozen into ice and ice can be melted back into water.
• Children can mentally arrange a group of items in sequence, such as organizing objects from tallest to shortest.
• Children understand that others have their own thoughts and perspectives, though they may not be able to identify exactly what others are thinking or feeling.
• Children can follow multi-step instructions.

Formal operational stage (12 years and up)

The formal operational stage is the fourth and final stage in Piaget's stages of development. It begins at age 12 and continues through adulthood. During the formal operational stage, children develop abstract thinking and use deductive reasoning to devise creative solutions to problems.

Major characteristics and developmental changes of the formal operational stage:

• Children can develop solutions to problems using logic and general principles.
• Children can approach problems systematically.
• Children can consider multiple possible outcomes and develop efficient, logical approaches to solving them.
• Children can think about hypothetical scenarios and formulate a range of solutions.

Activities Across Developmental Domains

Use this guide to craft strategies for activities that foster child development across developmental domains.

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How to apply Piaget's stages of development in early childhood education

Children who attend early childhood education programs are typically in the sensorimotor and preoperational stages of cognitive development. Educators can use Piaget's stages to design lessons and activities that guide children through each stage of development.

Infants and young toddlers (sensorimotor stage)

Children in the sensorimotor stage depend on their senses to explore the world. Educators can support development by designing a curriculum that engages the senses and builds object permanence.

Activities for children in the sensorimotor stage:

• Peek-a-boo: Helps children develop object permanence by demonstrating that people and objects still exist even when hidden from view.
• Container play: Have children place objects into containers and dump them out. This activity builds object permanence and encourages cause-and-effect thinking.
• Stacking blocks: Provides visual and tactile stimulation, supports motor skill development, and encourages persistence, problem-solving, and interactive play.

Toddlers and preschoolers (preoperational stage)

Children in the preoperational stage begin to use abstract thinking and imaginative play. Educators can support this stage by designing activities that encourage parallel play and engage children's imaginations.

Activities for children in the preoperational stage:

• Dress-up and role play: Pretend play can help children work through egocentrism by encouraging them to see the world from someone else's perspective. Keep a box of costume items available so children can dress up as different people and practice putting themselves in others' shoes.
• Sorting: Ask children to sort objects such as buttons, game pieces, or blocks by color, size, or another characteristic. This activity builds early logical thinking by teaching children to group items based on shared properties rather than treating all objects the same.
• Drawing family portraits: Ask children to bring in a family photo and use it as a reference while drawing. Discussing the characteristics of each person in the photo encourages observational skills and reinforces how children understand identity and relationships.\

Connecting Piaget's stages with Gardner's multiple intelligences

Piaget's stages of cognitive development provide a framework for understanding how children acquire knowledge and adapt to their environment. Similarly, Howard Gardner's theory of multiple intelligences highlights the diverse ways children express their intellectual abilities.

By integrating these two theories, educators can create a more holistic approach to teaching. For instance, during the preoperational stage, children often exhibit strong linguistic-verbal or visual-spatial intelligence, which can be nurtured through storytelling or drawing activities.

Criticisms of Piaget's theory

Piaget's theory of cognitive development has faced several notable criticisms:

• Contemporary psychologists claim that children meet developmental milestones sooner than Piaget proposed.
• Piaget assumed that children who couldn't perform certain cognitive tasks lacked the underlying cognitive structure needed to complete them. His framework also didn't account for the influence of social and cultural factors on cognitive development.
• Piaget studied his own children first, and when studying others, used small sample sizes—practices that don't meet modern scientific research standards.

Despite these criticisms, Piaget's theory remains influential in both psychology and early childhood education. Its framework continues to provide a useful tool for understanding how children think and learn.

Frequently asked questions about Piaget's stages of development

What is the preoperational stage in Piaget's theory?
The preoperational stage is the second of Piaget's four stages of cognitive development, spanning ages two to seven. During this stage, children develop language and begin to use symbols and imagination, but can't yet apply logic to manipulate information. Key characteristics include egocentrism, the emergence of pretend play, and the gradual development of conservation around age five.

In what order do Piaget's stages of development occur?
Piaget's stages always occur in the same fixed order: sensorimotor (birth to two years), preoperational (two to seven years), concrete operational (seven to eleven years), and formal operational (twelve years and up). No stage is ever skipped, and each stage builds on the one before it.

Can Piaget's stages be used to plan a preschool curriculum?
Yes. Piaget's stages of development are widely used to inform early childhood curriculum design. For children in the preoperational stage—typically preschool-aged—educators can plan activities like pretend play, sorting, and drawing exercises that align with how children are cognitively wired to learn at that age.

What age is each stage of Piaget's theory?
Piaget's stages are generally divided by age ranges as follows:

• Sensorimotor stage: Birth to 2 years
• Preoperational stage: 2 to 7 years
• Concrete operational stage: 7 to 12 years
• Formal operational stage: 12 years and up

These age ranges are approximate, as children may progress through stages at slightly different paces depending on individual development.

How can teachers apply Piaget's theory in the classroom?
Teachers can apply Piaget’s theory by designing activities tailored to the cognitive abilities of children at their respective stages. For example:

• In the preoperational stage, teachers can encourage learning through pretend play, storytelling, and hands-on activities like sorting and building blocks.
• During the concrete operational stage, incorporating problem-solving tasks, experiments, and group discussions can help develop logical thinking.

Final thoughts

Despite its limitations, Piaget's cognitive development theory offers meaningful insight into how children think, learn, and adapt their understanding of the world. A working knowledge of Piaget's stages can help early childhood educators shape their curriculum and provide more targeted support at each stage of development.

Quick reference: Piaget's stages by age

Need a quick answer? Here's a breakdown of Piaget's stages of cognitive development by age:

• What stage is a 1-year-old in? The sensorimotor stage (birth to 2 years). At this age, infants learn about the world through their senses and motor actions.
• What stage is a 3-year-old in? The preoperational stage (2 to 7 years). A 3-year-old's thinking is largely symbolic and egocentric, meaning they struggle to see things from others' perspectives.
• What stage is a 5-year-old in? The preoperational stage (2 to 7 years). They are developing language and memory but still lack logical reasoning.
• What stage is an 8-year-old in? The concrete operational stage (7 to 11 years). An 8-year-old is beginning to think logically about concrete events and understands concepts like conservation.
• What stage is a 10-year-old in? The concrete operational stage (7 to 11 years). Logical thinking becomes more developed, but abstract thought is still difficult.
• What stage is a 14-year-old in? The formal operational stage (12 years and up). A 14-year-old can think abstractly, reason about hypothetical situations, and engage in systematic problem-solving.