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ACT Science: Data Representation

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The ACT science exam does not require students to have in-depth understanding of biology, chemistry and/ or physics. It simply tests students on how to read and analyze  scientific passages. One of the passage types for ACT Science is data representation. Students will be asked to analyze tables, bar graphs, scatter plots, pie chart, histograms…

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Deciphering Meaning from Reading Passages on the SAT and ACT

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Overview Questions about longer reading passages on the SAT, ACT, and other standardized tests tap students’ abilities to find and use meaning from what they read.  These skills are important to college success, as students are expected to read and understand textbooks in unfamiliar subjects.  Students are expected to extract the main ideas from what…

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Recognizing Nonstandard English: Diction Errors

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Overview Diction errors are types of errors when the incorrect word is used in a nonstandard way.  Some word usage is colloquial: out of place in a formal essay.  Other errors in word usage occur when similar words are used in the incorrect context. What about Lots or A Lot? The use of lots or…

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Math Review of Binomial Distributions

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Overview A binomial experiment  has a fixed number of independent trials, and each trial has only two possible outcomes.  Each of the trials has the same probability of success.  The probability distribution is called a binomial distribution. What Types of Problems Are Binomial? All the characteristics of a binomial experiment are present, then the distribution…

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Properties of Probability

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Overview: Probability is the measure of the likelihood of an event.  The basic mathematics of probability theory started with games of chance, but it can be applied to many situations, from weather forecasting to politics.  Probabilities range from 0 (no likelihood) to 1 (certainty), and are expressed as rational numbers. What Is the Sample Space?…

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Math Review of Random Numbers

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Overview:  What Are Random Numbers? In a set of random numbers, the numbers do not follow any pattern.  Each number has an equal probability of occurring, and each number event is independent of any others .  Most of the time, numbers that are close to random are generated by computer programs or calculator programs designed…

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Review of Nonstandard English: Idiom Errors

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Overview:  What Do the SAT and ACT Test in English Grammar? The SAT and ACT test for formal, academic, standard English, which is not necessarily the same way that students speak or write.  Many errors are especially insidious because the correct form and the incorrect form are very close.  However, some idiom errors involve words…

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Proofreading for Parallel Structure on the SAT and ACT

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Overview:  What Is Parallel Structure? Parallel structure in writing is a refinement technique in which verbs, subjects, and clauses are made similar.  It is tested on the ACT and SAT in grammar questions, as it is a feature that adds impact to writing.  Often, phrases that mean the same may not be parallel. Checklist:  Are…

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Stoichiometry: Dealing with Excess and Limiting Reactants

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Overview: In many chemical reactions there is an excess reactant a limiting reactant. The amount of product produced is determined by the stoichiometric calculations using the amount of limiting reactant present in the reaction. This means that not all of the excess reactant is used up during the reaction since there is no more of…

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How to Calculate Work Done by a Force

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Work is the energy applied to an object as it moves some distance. The amount of work done is directly proportional to the magnitude of force applied, as well as the displacement of the object. In some cases, there may be an angle between the direction of displacement and force vector. The force must be…

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