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The Leitner system [1] [2] [3] is a widely used method of efficiently using flashcards that was proposed by the German science journalist Sebastian Leitner in 1972. [ 4 ] [ 5 ] It is a simple implementation of the principle of spaced repetition , where cards are reviewed at increasing intervals.
Advanced Placement (AP) Biology (also known as AP Bio) is an Advanced Placement biology course and exam offered by the College Board in the United States. For the 2012–2013 school year, the College Board unveiled a new curriculum with a greater focus on "scientific practices".
AP Physics 1: Algebra-Based and AP Physics 2: Algebra-Based [52] Fluids, which used to be Unit 1 in AP Physics 2, will become Unit 8 in AP Physics 1. The format of both exams will change in the same way: The number of MCQs will go down from 50 to 40, and the time for the section will go down from 90 minutes to 80 minutes.
Each flashcard typically bears a question or definition on one side and an answer or target term on the other. Flashcards are often used to memorize vocabulary, historical dates, formulae or any subject matter that can be learned via a question-and-answer format. Flashcards can be virtual (part of a flashcard software), or physical.
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For most leagues, the fantasy football playoffs are kicking off this week with Week 14's byepocalypse behind us and a clean slate rest of season.
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Beta sheets consist of beta strands (β-strands) connected laterally by at least two or three backbone hydrogen bonds, forming a generally twisted, pleated sheet. A β-strand is a stretch of polypeptide chain typically 3 to 10 amino acids long with backbone in an extended conformation.