As you know when I went to a session that was container gardening. I found that this may the best option for me. Since I work with students that have disabilities, I can use container gardening to differentiate instruction.
To the left is a picture of a laundry basket. You would then add a little dirt over the regular potatoes or sweet potatoes. Then every time the vines started putting out leaves, the students would cover the plants with more dirt. When the vines withers it is time to flip over the basket.