Receiving raw content from SMEs

Does anyone know of a resource I could give to a SME to help him create the raw content for me to work with for a course? This is a situation in which there are no existing resources. All the information is in his, and his coworkers' heads. The content is extensive so conducting an interview(s) would be impractical. I was hoping there already exists some sort of checklist or outline with examples that might help him to see how to get the information written down.