Kids like to spend money. It was reported that American teens between 15 and 17 had over $2,000 a year to spend. The most common ways kids spend their money are by hanging out with friends and buying toys. While some teens think about saving their money, about 21 percent say they don’t save any money at all.

In 90 percent of American homes, kids are expected to do some chores to get their allowance, such as walking dogs and cleaning the yards. The average (平均的) American child gets an allowance of $780 a year. Children have the right to deal with it themselves.

Parents need to talk to kids about money early. When is the best time? The earlier the better, according to experts. Even pre school children can learn about money. For example, they can learn that you need money to buy things and you make money by working. They can learn that there is a difference between the things you want and the things you need.

The experts suggest between 6 and 10, children can learn to make choices and to compare prices, between 11 and 13, they can learn that they should save ten cents of every dollar they receive, and between 14 and 18, they should start to compare the cost of different colleges.

Warren Buffet is one of the most famous billionaires in the world. He said that how successful the child will be later in life may depend on the age at which parents teach their kids good financial (经济的) habits. Buffet taught his children the value of learning from experience. He allowed them to succeed and fail on their own. He didn’t help them financially if they got in any trouble. Interestingly, he wasn’t planning on leaving his grown children a large inheritance. He said, “I don’t want to give my kids so much that they would feel like doing nothing.”

Do you have social jetlag?

Our sleep changes through our lives in many different ways. When it comes to the hours of sleep that we need, they seems to become less as we get older. Even though it may seem that teenagers need a lot of sleep,14-year-old to 17-year-old typically need around 8 to 10 hours per night, which isn’t too dissimilar to adults 7 to 9 hours per night .

The timing of our sleep changes as we age. During adolescence（青春期）, sleep timing becomes later. Interestingly, this change in sleep timing happens in adolescents around the world and is even found in other mammals（哺乳动物）. Because society is changing and young people often have to live out of their natural ways because they have to get up early to go to school in the week. If they are unable to fall asleep early, this can mean they may not sleep enough. When the weekend arrives, they have more control over their schedule（日程安排）, so ★. They may try to “catch up” on sleep loss during the school week.

This shift in sleep timing has been called “social jetlag”, as a change in schedule can lead to jetlag symptoms（症状）. Social jetlag has been connected with factors including fatness and unhappiness. It is sometimes suggested that a weekend lie-in （睡懒觉） is fine, but that proper wake time should be within two hours of that during the weekday, to make people become well from no enough sleep, while stopping social jetlag from becoming worse.