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Math Review of Commutative and Associative Properties 150 150 Deborah

Math Review of Commutative and Associative Properties

Overview:  Properties of Addition and Multiplication The commutative and associative properties of addition and multiplication are useful within operations.  Both properties help students to arrange and group numbers more effectively.  However, these properties do not hold for either subtraction or division. What Is the Commutative Property? The commutative property of addition and multiplication states that…

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Using Prepositions and Conjunctions on the SAT and ACT 160 128 School Tutoring

Using Prepositions and Conjunctions on the SAT and ACT

Overview:  Why Prepositions and Conjunctions? Both prepositions and conjunctions show relationships between words within sentences.  It is important to use both types correctly, as changing either the preposition in a prepositional phrase or the conjunction can change the direction and meaning of the sentence.  Although they may be overlooked during proofreading, the correct preposition or…

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Math Review of Estimation 150 150 Deborah

Math Review of Estimation

Overview: Estimation is the process of approximating answers in common situations.  Sometimes the exact value is not necessary, as when estimating the number of people who attend an outdoor concert.  Sometimes it is easier to use approximate figures, such as when estimating the amount to add for tax or a tip.  The most common forms…

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Science Review of Heat and Temperature 150 150 Deborah

Science Review of Heat and Temperature

Overview: Heat energy is kinetic energy caused by the vibration of particles within a substance.  Temperature is the measure of the average heat energy within a sample of the substance, while heat is the total energy.  Although they are very closely related, they are not exactly the same. How Are Heat and Temperature Different? Heat…

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Recognizing Appropriate Sentence Construction in Reading Passages 275 183 School Tutoring

Recognizing Appropriate Sentence Construction in Reading Passages

Overview:  Why Sentence Construction? Some test questions in the English/grammar portion of the SAT, ACT, and other tests ask students to read a passage and find the best way to rewrite it, whether by combining sentences or correcting sentence fragments.  The reason questions like this are asked is to test students’ ability to apply their…

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Introduction to the Periodic Table 150 150 Deborah

Introduction to the Periodic Table

Overview:  What Is the Periodic Table? The periodic table is a grouping of chemical elements arranged in families based upon their chemical properties.  The most common form of the periodic table has 18 such vertical groupings, known as families, and 7 horizontal rows known as periods.  There are usually two rows that are placed at…

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Back-to-School Review: Use of Commas 150 150 Deborah

Back-to-School Review: Use of Commas

Overview: Commas are one of the most common forms of punctuation inside sentences.  They separate words and phrases that occur in a series, between cities and states, between states and countries, in numbers over 999, and also separate types of clauses.  For example, within this paragraph, six different commas have been used. Commas within Series Commas…

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Math Review of Rational Numbers 150 150 Deborah

Math Review of Rational Numbers

Overview:  What Are Rational Numbers? Rational numbers are numbers that can be expressed as a fraction, a/b, when b is not equal to zero.  Both a and b are integers, and rational numbers can be either positive or negative.  Rational numbers can take part in mathematical operations of addition, subtraction, multiplication, and division. What Are…

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Biology Review: Inheritance of Human Traits 150 150 Deborah

Biology Review: Inheritance of Human Traits

Overview of Human Heredity Genetic traits in human beings come about through a variety of pathways.  Some are caused by a single gene, while others come from multiple genes working together.  Some conditions are sex-linked and recessive, so that more males than females express the gene in their phenotype.  Chromosome abnormalities also influence some traits. …

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A Biology Review of Twins 150 150 Deborah

A Biology Review of Twins

Overview: What Are Twins? Twin births, in which a single pregnancy results in two fetuses, are the most common form of multiple births.  Most of the time, human babies are born one at a time,. but about 33 times out of one thousand births per year in the United States, twins are born.  Fraternal twins are…

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