Most children have an interest in learning to play a musical instrument at one point or another during their growing-up years. Parents need to take advantage of that urge to play when it appears. Some very small children become intrigued with music because they see their parents or their older siblings play. The Suzuki method of instruction capitalizes on that early willingness to learn by involving the parent and the child in the child’s instructions. Elementary-aged youngsters often are exposed to stringed instruments or band instruments in their school music classes. Because kids like to do what other kids do, parents who are not musicians themselves can take advantage of both instruction and enthusiasm. It is at the middle school level, however, that peer pressure can really work to the benefit of parents who want to hear the sound of music around the house.
What is the Main Idea?

The Louisiana Purchase proved to be one of the shrewdest business pacts in the entire history of the United States. The purchase doubled in the area of the country and provided territory from which fourteen new states were created either wholly or in part. It also gave us control over the mouth of the Mississippi River and opened up the way to foreign trade. Prior to the purchase, the waterway had been blocked by the Spanish, probably with the approval of Napoleon. The land that was bought was rich in timber, minerals, and natural resources of many kinds. Finally, the cost of the transaction was unbelievably low; the total of $15 million amounted to about four cents an acre. 
What is the Central idea?

 There is some evidence that colors affect you physiologically. For example, when subjects are exposed to red light respiratory movements increase; exposure to blue decreases respiratory movements. Similarly, eye blinks increase in frequency when eyes are exposed to red light and decrease when exposed to blue. This seems consistent with intuitive feelings about blue being more soothing and red being more arousing. After changing a school’s walls from orange and white to blue, the blood pressure of the students decreased while their academic performance improved

 Imagine testing glass by throwing chickens at it? Sometimes fast moving airplanes fly through flocks of birds. If the birds hit the windshield of a plane, the glass could shatter and cause a crash. Airplane manufacturers have made a chicken cannon that fires rubber chickens at glass windshields. If the windshield doesn't break when the rubber chicken hits it, the designers know that the glass can withstand the force of a real crash.

Every year hungry deer do millions of dollars' worth of damage to young pine trees. Scientists in Washington have found a way to protect the trees. They use a substance called selenium. Selenium produces a bad smell when dissolved. A bit of this element is put in the ground near trees. Rain dissolves the selenium, and the trees absorb it. The bad smell keeps the deer away until the trees are fully grown.

Product codes on items consist of bars and numbers on the product label. The first number tell which company made the item. The last numbers identify the product and size. A laser reads the bars at the checkout. A computer finds the price for that product and prints the price on the cash-register slip. Store owners can change prices of items by changing the computer. The records in the computer help the owners learn which goods sell well.