Writing a post is something that gets better with practice however there are a few guidelines that can help you develop consistency, readability and confidence with writing. Try to remember to do the following;
Always use a good title that relates to the post. Your teacher may tell you what they want you to use. If you're not sure check with your teacher
Proofread your work by looking for any spelling or grammatical mistakes
Use labels on every post to help organise you posts
Use the framework provided by your teacher