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Computational chemistry is a branch of chemistry that uses computer simulations to assist in solving chemical problems. [1] It uses methods of theoretical chemistry incorporated into computer programs to calculate the structures and properties of molecules , groups of molecules, and solids. [ 2 ]
The United States National Chemistry Olympiad (or USNCO) is a contest held by the American Chemical Society (ACS) used to select the four-student team that represents the United States at the International Chemistry Olympiad (IChO). Each local ACS section selects 10 students (or more for larger ACS sections) to take the USNCO National Exam.
It also has a collaboration with independent chemists, which are mentioned in "Meet the chemistry professional". Khan Academy has also supported Code.org's Hour of Code, providing coding lessons on its website. [33] In July 2017, Khan Academy became the official practice partner for the College Board's Advanced Placement. [34]
Both high school AP teachers and university professors are invited to grade the exams at a predetermined location. When the AP Reading is over for a particular exam, the free response scores are combined with the results of computer-scored multiple-choice questions based upon a previously announced weighting.
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Teacher committees [10] are brought to Austin to review the proposed test items, and finally the items are field-tested on some Texas students, called a "mock test." Using the input of the teacher committee and the results of field-testing, TEA and Pearson build the real STAAR. Very hard questions are usually removed from the test.