The following documents are different resources for assisting writers. 

Proofreading symbols - although basic in nature, they will visually aid a writer. 

Additional proofreading symbols- these four symbols will provide immediate and concise feedback for a writer. 

Questions to ask a writer - these questions are used for peer editing and conferencing. 

The ABC's-  this technique is a wonderful tool for open ended questions or addressing a prompt. The time limits are precise and helpful.