Job sheets, providing the allotment of jobs is changed each week, are a good stimulus to teach the children the habit of looking. Sufficient jobs must be planned so that each child in the class can be made responsible for something, and the children become keen to see what jobs they have been given each week. Perhaps the most valuable asset of all is the nature table, as it is a living corner where changes can and do occur in the actual specimens themselves. The class, or for older children, the individual, diary is a good medium for training children to look and remember, and if encouraged, also means that the children are learning to use their eyes and take note of things and occurrences outside the daily routine of school. Drama and mime are useful adjuncts to observing, memorizing, and recalling actions.