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The idea of using atomic transitions to measure time was first suggested by the British scientist Lord Kelvin in 1879, [204] although it was only in the 1930s with the development of magnetic resonance that there was a practical method for measuring time in this way. [205] A prototype ammonia maser device was built in 1948 at NIST. Although ...
Similar methods of measuring time were used in medieval churches. [ citation needed ] The invention of the candle clock was attributed by the Anglo-Saxons to Alfred the Great , king of Wessex . The story of how the clock was created was narrated by Asser , who lived at Alfred's court and became his close associate. [ 2 ]
Circle time provides a time for listening, developing attention span, promoting oral communication, and learning new concepts and skills. It is a time for auditory memory, sensory experiences, socialization, and a time for fun. Circle time can be a complex, dynamic interaction among adults, children, and resources used.
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Just-in-time teaching was developed for university level physics instructors in the late 1990s, but its use has since spread to many other academic disciplines. Early work was done in the physics department at Indiana University – Purdue University Indianapolis (IUPUI) in collaboration with physics instructors at Davidson College and the United States Air Force Academy (USAFA). [1]
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Summative assessment usually involves students receiving a grade that indicates their level of performance. Grading systems can include a percentage, pass/fail, or some other form of scale grade. Summative assessments are weighed more than formative assessments.
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