Gardening in raised beds is extremely popular and a great choice for a beginning gardener. I gardened in raised beds for nine years and had great success (minus a splinter or two).
raised bed
If you are building a learning garden, the raised garden beds may be the central focus of all your teaching. It is important that you have the right material for your school gardening efforts. Fortunately, our county extension office just renovated their demonstration garden, and I can show you some examples that can be used at school or at home.
The educational and environmental impact of an outdoor classroom and learning garden is not easily measured, but it certainly can be measured by a smile when they bite into a freshly picked apple.