One of the most important aspects of agile development training is estimating and planning. Yes, these are important, even for agile software development. Although agile is a fluid and iterative process, that doesn't mean that planning doesn't have a place in its programming and project management.

Projects start with their requirements. How those requirements are documented or expressed has a tremendous influence on the rest of the project. A great way to build software that meets real users' real needs and gets the project off on the right foot is to begin with user stories.