One week He may dictate examples to them, and let them come together to compare their results, one of the class being appointed to keep a list of all who are correct each day.

At another time each one may write an example, which he may read aloud to all the others, to be performed and brought in at the next time.

Again, he may let them work on paper with pen and ink, that he may see how few mistakes they make, as mistakes in ink can not be easily removed.

He may excite interest by devising ingenious examples, such as finding out how much all the numbers from one to fifty will make when added together, or the amount of the ages of the whole class, or any such investigation, the result of which they might feel an interest in learning.

Thus the object is steadily pursued, though the means of pursuing it are constantly changing.