Raised beds can come in many forms, from small round containers to large boxes. The basic principles are the same, regardless of shape or size.
The beds can be filled with a soilless growing medium, a soil blend, or lasagna layers. The best method will depend on the quality and quantity of materials available, and your budget. Be aware that some manure, compost, and straw may contain persistent herbicides.
The following bulletins will help you get started with raised beds, and maintain them for many years to come!