Children make marks on paper randomly with little muscular control, using a scrubbing motion (2 and 3-year olds).
Children "write" across the paper in a linear fashion, repeating patterns over again, showing increased muscular control (3 year olds).
Children make mock letters. These are written lines of letters that have letter characteristics but they are misshapen and written randomly, often covering the page. They like to pretend they are writing, and in their work they separate writing from drawing. They have purpose to their letter-like forms (3 and 4 year olds).
Children write letters to represent words and syllables. They can write their name. They know that a word represents their name. They can copy words. Reversals, or loss of a developmental gain, are frequent (4 year olds).
Children make the transition from letter forms to invented spelling. This requires organization of letters and words on the page. They use a group of l~tters to form a word. Many of the letters will be consonants. They understand that letters relate to sounds. Some punctuation is used. They can copy words seen in their environment (4 and 5 year olds).
Most of the words the children use are written correctly, some add punctuation. They organize their words in lines with spaces in between, and they move from the left to the right and from the top of the page to the bottom (5-, 6-, and 7-year olds). Revising and editing.