Writing in childhood is the process of developing writing abilities during the early years of life, generally from infancy to adolescence. Writing in childhood encompasses the growth of writing abilities, including acquiring skills to write letters and words, comprehending grammar and sentence structure, and cultivating the capacity to communicate ideas and feelings through written language, which is very significant as it has an impact on academic achievement, social and emotional growth, and eventual professional accomplishments. Children's experiences with writing and creating texts is an important avenue for self-expression in early childhood. These experiences also support precursors to their later reading and writing development. While the development of children’s writing abilities lies heavily in literacy instruction and social experience, cognitive development has shown to hold an important role. The cognitive aspect of development encompasses the mental processes behind the observed changes in children's writing.

Four developmental stages Based on what has been discussed in the ontogenesis of writing in childhood and adolescence by Frances Christie (2010),Christie, F. (2010). The ontogenesis of writing in childhood and adolescence. In The Routledge international handbook of English, language and literacy teaching. Routledge. the developmental stages for writing in children could be generally divided into four stages:

1. The emergent stage (6-8 years) The initial stage of writing in childhood is marked by early literacy skills like drawing and scribbling, which become more recognizable as writing as children enhance their fine motor abilities. The development of fine motor abilities, which are activated from practices of tracing and drawing letters and symbols, help children to begin to form letters. This stage is considered important in the development of children's early writing skills because it gives them a fundamental understanding of writing and reading texts. It also lays the foundation for grasping the connection between written and spoken language. Research has shown that during this age range, children experiment with different ways to convey meaning, thus realizing that writing is a symbol of language. During this stage, children begin to grasp the notion that writing represents language, and they test various ways of creating marks on paper to convey meaning. Psychologists have also demonstrated that during these developmental stages, the skills of children are determined by their interactions and the amount of experience they receive at a young age. Executive function development such as memory and self-control, also play a key role during this stage. Research shows that literacy-rich home environments are helpful to emergent writing development by giving the opportunity for the children to interact with storytelling, books and writing materials. These functions allow children to plan and draft their writing tasks. Evidence based practices include combining writing with reading activities to allow children to practice writing for other purposes such as storytelling and writing practical documents. Teachers can integrate these practices of modeling letters into children's early writing experiences to influence an understanding of writing structure.

Research suggests that early writing development has several interacting factors including transcription skills, idea generation and behavioral self-regulation. Self-regulation becomes especially important when children get involved in writing tasks that are more complex.

2. The developing stage (7-9 years) This stage, also referred to as the transitional stage, is characterized by an increasing level of control over writing, including a more sophisticated understanding of grammar, spelling, and punctuation. Children at this stage begin to write more complex sentences and paragraphs, and they are able to communicate their ideas more effectively. At this stage, the curriculum plays an important role in the children's skill development. Research has shown that support from teachers such as writing activities are strongly correlated with improved writing outcomes. Children may also experiment with different writing styles and genres as they continue to refine their skills.

One of the key aspects of the developing stage is the increased focus on writing for different purposes and audiences. Children at this stage are encouraged to write in a variety of genres, such as writing personal narratives, which helps them to develop a deeper understanding of the conventions of different genres and to become more adept at tailoring their writing to different audiences. This stage shows a shift from emergent writing to more conventional writing, as children begin learning and practicing transcription skills and organizing their ideas.

3. The consolidating stage (9-12 years) This stage marks a development in children's writing abilities where they produce more elaborate sentences and paragraphs, owing to their enhanced grasp of grammar and spelling. It is a critical stage because it involves possessing writing abilities and cultivating a more advanced writing style. Children who successfully advance through this stage are better equipped to tackle the requirements of academic writing and other types of written communication.

One important aspect of the developing stage is the emphasis on revising and editing. Children at this stage are encouraged to go back and review their writing, looking for ways to improve clarity, coherence, and effectiveness, and they may also receive feedback from teachers or peers, which helps them to develop a more critical thought.

4. The commanding stage (12-18 years) The final stage of the development of writing in childhood and adolescence is known as the commanding stage It is characterized by mature writing skills, including the ability to write for different purposes and audiences, to use a variety of writing styles and genres, and to revise and edit writing for clarity and effectiveness. At this stage, children have become confident and skilled writers, in control of the grammar and written language conventions, which allows them to use writing to achieve their goals and express their ideas with clarity and precision. This stage represents the culmination of years of developing writing skills and is a key indicator of a child's ability to communicate effectively through writing, preparing them for the demands of academic writing and other forms of written communication in adulthood.

Principles Some principles are used to identify the different stages of development that children have mastered. These principles are the recurring principle, the generative principle, the inventory principle, and the sign principle. These principles were originally outlined in Marie Clay's book, What Did I Write?, and have been widely accepted.

The Recurring Principle This principle is when children understand the repetition of patterns and shapes in English writing. Some examples of these can include scribbles that follow a similar pattern. This repetition is important because it builds cognitive reinforcement for the writing skills that are being taught and learned. This reinforcement will later contribute to the expansion of writing and writing skills in the future. Deborah Wells Rowe and Sandra Jo Wilson wrote in their article, The Development of a Descriptive Measure of Early Childhood Writing: Results From the Write Start! Writing Assessment, "To participate as writers, children had to construct understandings about what writing marks look like and how writers choose which kinds of marks to make."

Generating Principle This principle describes when children reorganize a limited set of units and create new meanings by experimenting with the way they are combined or arranged. This can be illustrated through the use of letters, however this principle focuses on exploration and creating new combinations rather than precise word formation.

Inventory Principle In this principle, children often inventory items by listing them or naming them. This can follow up the form of a list, going downwards in a vertical structure.

The Sign Principle This refers to children's understanding of print representing entities that aren't printed, such as word boundaries and page layout. For instance, this can be illustrated by the drawn-out figure of a girl to represent the word girl with different scribbles or letters around the figure.

Cognitive development in children's writing Writing is a complex process, demanding multiple cognitive processes to operate at once. The major mental processes include planning, translating, and revising. Through the first process of planning, a writer extracts information from their long-term memory to organize and set mental writing goals. Long-term memory holds knowledge related to a topic, an intended audience, genre, and general plans to complete a specific writing task. Translation refers to the process of turning ideas or thoughts from memory into (written) language. The revision process is comparable to editing where the writer evaluates their work for discrepancies and corrects conventional mistakes.

Metacognition and cognitive control in children’s writing are fundamental processes of effective writing. Metacognition is referred to as the conscious regulation and control of cognitive activities, which utilizes possessed knowledge of oneself, the task, and potential strategies. Younger writers tend to struggle with coordinating multiple writing processes at once as they rely on the “retrieve-and-write” strategy where ideas recalled from memory are immediately written, without planning or revising. This strategy requires less cognitive demand and results in disorganized, incoherent writing. As young writers gain more writing experience, their metacognitive control increases allowing them to carry out the writing process more effectively.

Other kinds of learning in childhood

Learning handwriting Handwriting, defined as the ability to produce legible and quick writing by Dinehart,Dinehart, L. H. (2015). Handwriting in early childhood education: Current research and future implications. Journal of Early Childhood Literacy, 15(1), 97-118. are closely related to writing in childhood, for developing handwriting skills in early childhood supports the advancement of some writing skills, such as reading and understanding of contextual cues, which might link to later academic success. Support of development of reading skills Handwriting has been shown to be connected to writing development. The first developmental stages of writing starts around the age of two, where children begin to produce random scribbles. They will eventually advance to marks of horizontal and vertical strokes. Around the ages of three to five, children start to realize that the marks and scribbles they make are in relation to writing.

Research indicates that handwriting and reading share neural pathways and the cognitive processes involved in handwriting, such as letter formation and letter-sound relationships, are also involved in reading acquisition. Additionally, the physical act of writing helps children develop visual and spatial awareness, fine motor skills, and hand-eye coordination, which are also important for reading process. Handwriting readiness and the likelihood of later academic success