Informal writing could be called rough draft writing, discovery writing, or exploratory writing. Everyone who writes does it, but few are aware of what they are doing or the value of it, and still fewer are aware of how important it is for student

Student

A student is a learner, or someone who attends an educational institution. In some nations, the English term is reserved for those who attend university, while a schoolchild under the age of eighteen is called a pupil in English...

s learning to write. Informal writing is the tentative writing

Writing

Writing is the representation of language in a textual medium through the use of a set of signs or symbols . It is distinguished from illustration, such as cave drawing and painting, and non-symbolic preservation of language via non-textual media, such as magnetic tape audio.Writing most likely...

we do in order to discover what we know and what we can express on our first try.