When a child reaches this their writing resembles an adults writing. Allowing children time to write and helping them sound out words will allow them to write in a more conventional way. You can allow children to keep a journal, have them write you notes (and you write them notes back), and other such ways that will allow children to experience writing.
Children create their own spelling for words when they do not know the conventional spellings. This video will explain all about invented spelling, and give stratagies. As the video says it is okay, and even a good thing for students to use invented spelling, to help children learn the proper spelling having students sound out words can help them to learn to spell in a conventional way.
A child will use letter sequences learned from sources such as his or her own name, and change the order of the letters, writing the same ones different times, or reproduce letters in long strings or in random order. To help children with this you can teach children how to spell their name and ask them to write it, they will start to write it more often, this helps them for the next form of writing, with invented spelling.
Children will use drawing as as stand in for writing. Sometimes they may draw to tell a story, to explain themselves, to let you know how they feel, or even draw just because someone asked them to. To help children with drawing you can draw with them, provide them with many different writing utensils such as crayons, markers, and other such materials. A variety of paper will also help students become more interested in drawing, children need to be interested in order to learn.
Children’s first form of writing is scribbling. You can help children write by allowing them to express themselves through the medium, you can also allow children to see you writing be it a journal, a to do list, or other forms of writing (even writing an e-mail).