【推荐2】

【推荐3】Some kids feel uncomfortable. Here is the advice for them.

【推荐2】Do you ever wonder why you can go over a book again and again and still be lost when tested on what you read? It may be because you haven’t practiced remembering.

Remembering is a useful way to help us learn. Some of us remember best by listening; some by re-reading; and others by using pictures and diagrams (图表). Schools try many of these different ways to help students “download” new information.

But a recent study from Purdue University says that successful learning means being able to recall information at any moment.

“Our view is that learning is not about studying or getting knowledge ‘in memory’,” said Jeffrey Karpicke, the lead researcher. “Learning is about retrieving (回忆). So it is important to make retrieval play an important part in the learning process.”

The researchers studied two groups of students. Both groups learned something from a text. One group made diagrams about the text. This method is called concept mapping (概念图). The other group put the text away after learning it from memory.

Then, both groups were tested on the information they had learned. Both groups scored well at recalling the learned information.

However, when they were asked to return one week later, the group who made diagrams scored better than the group who did not. So by drawing concept maps, we are able to recall information far better, which will help us to study.

Our mind, just like our body, has to practice activities to become good at them.

【推荐3】We all know snails. They move very slowly. But do you know that much of the time snails don’t move at all? They’re in their shells（壳）— sleeping.

Hot sun will dry out a snail’s body. So as soon as it sees the hot sun, the snail draws its body into its shell and closes the opening with a thin cover. Then it goes to sleep. A snail will die in a heavy rain. So whenever it rains, it goes inside its shell house and goes to sleep. A snail can sleep for as long as it needs to. It can take a short sleep. Or it can sleep for days at a time. And it spends all the winter months in its shell.

In the spring the snail wakes up. Its body, about three inches long, comes out from the shell. When hungry, the snail looks for food. It can’t see very well. Its eyes, at the ends of the top feelers（触角）are very weak. But its sense of smell is very strong. It helps the snail to the new greens. Then the snails little mouth goes to work.

A snail’s mouth is no bigger than the point of a pin. Yet it has 256,000 teeth! The teeth are so small that you can’t see them. But they do their work. If you put a snail in a hard paper box, it will eat its way out! And if a snail wears out（磨损）its teeth, it will grow new ones.

Mostly, a snail looks for food at night: But on cloudy days it eats in the daytime. It eats all day long. A snail can go on eating for hours and never feel full.