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The main idea of any type of text (spoken or verbal), including a lecture, is the main, most important point the writer/speaker is making. In one text, there can be multiple main ideas. You can easily recognize the main ideas of a lecture by looking at its title and subtitles. For example, if you are listening to a lecture about the central nervous system, the main points could be the central nervous system itself and its most important parts, which will be represented by titles and subtitles.
When you're taking notes, you should write down the most important things the lecturer is saying. This includes the things that are closely related to the main ideas, such as definitions and explanations. If you are unable to write everything down (which is usually the case), you should focus on these main points and ignore the details, because it's more likely that you won't need them.
Lev Vygotsky.
The work of <em>Lev Vygotsky </em>has become the foundation of what has become Social Development Theory. His theories emphasize the fundamental role of social interaction in the development of cognition, as he believed that community plays a central role in the process of "making meaning". In other words, social learning tends to precede development.
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The Court is the highest tribunal in the Nation for all cases and controversies arising under the Constitution or the laws of the United States. ... The Supreme Court consists of the Chief Justice of the United States and such number of Associate Justices as may be fixed by Congress.
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Examples of a primary source are: Original documents such as diaries, speeches, manuscripts, letters, interviews, records, eyewitness accounts, autobiographies. Empirical scholarly works such as research articles, clinical reports, case studies, dissertations.
Examples of a secondary source are: Publications such as textbooks, magazine articles, book reviews, commentaries, encyclopedias, almanacs.
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