Answer:
15. Un compuesto químico se puede representar gráficamente por medio de una
Explanation:
A. <span>a. to inform readers based on Tan’s childhood experience
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Year-round school in the United States is neither a new concept nor an unusual one. Traditional school calendars and year-round schedules both provide students with about 180 days in the classroom. But instead of taking off much of the summertime, year-round school programs take a series of shorter breaks throughout the year. Advocates say the shorter breaks make it easier for students to retain knowledge and are less disruptive to the learning process. Detractors say the evidence to support this assertion is unconvincing.
Traditional School Calendars
Most public schools in America operate on the 10-month system, which gives students 180 days in the classroom. The school year typically begins a few weeks before or after Labor Day and concludes around Memorial Day, with time off during Christmas and New Year's and again around Easter. This school schedule has been the default since the earliest days of the nation when the U.S. was still an agrarian society, and children were needed to work in the fields during the summer.
Year-Round Schools
Educators began experimenting with a more balanced school calendar in the early 1900s, but the idea of a year-round model didn't really catch on until the 1970s. Some advocates said it would help students retain knowledge. Others said it could help schools reduce overcrowding by staggering start times throughout the year.
The most common application of year-round education uses the 45-15 plan. Students attend school for 45 days, or about nine weeks, then take off for three weeks, or 15 school days. The normal breaks for holidays and spring remain in place with this calendar. Other ways to organize the calendar include the 60-20 and 90-30 plans.
Single-track year-round education involves an entire school using the same calendar and getting the same holidays off. Multiple-track year-round education puts groups of students in school at different times with different vacations. Multitracking usually occurs when school districts want to save money.
