Algebraic expressions
What Are Numerical and Algebraic Expressions? (4:31) http://www.virtualnerd.com/algebra-1/algebra-foundations/variables-expressions/algebraic-expressions/numerical-algebraic-expressions
Parts of algebraic expressions: variables, constants, terms, coefficients
What is a Variable? (1:40) http://www.virtualnerd.com/algebra-1/algebra-foundations/variables-expressions/algebraic-expressions/variables-definition
What is a Constant? (1:43) http://www.virtualnerd.com/algebra-1/algebra-foundations/variables-expressions/algebraic-expressions/constant-definition
What's a Coefficient? (6:01) http://www.virtualnerd.com/algebra-1/algebra-foundations/coefficient-definition.php
What's a Term? (5:11) http://www.virtualnerd.com/algebra-1/algebra-foundations/simplifying-expressions/simplifying-expressions-examples/polynomial-term-definition
Evaluating algebraic expressions, for a given value of the variable(s)
How Do You Evaluate an Algebraic Expression by Plugging In Values? (1:07) http://www.virtualnerd.com/pre-algebra/algebra-tools/plugging-variables-into-expressions.php
How Do You Complete a Table By Plugging in Values? (2:24) http://www.virtualnerd.com/pre-algebra/algebra-tools/complete-table-plugging-in.php
Writing phrases as expressions and turning expressions into words
What Are Some Words You Can Use To Write Word Problems? (5:17) http://www.virtualnerd.com/algebra-1/algebra-foundations/variables-expressions/words-to-math-translation/words-for-math-symbols
How Do You Turn a Simple Verbal Phrase into an Algebraic Expression? (3:36) http://www.virtualnerd.com/algebra-1/algebra-foundations/single-variable-phrase-translation-to-math.php
How Do You Translate Phrases into Numerical Expressions? (5:41) http://www.virtualnerd.com/pre-algebra/algebra-tools/phrase-translate-to-numerical-expression.php
How Do You Turn a Simple Expression into Words? (3:00) http://www.virtualnerd.com/algebra-1/algebra-foundations/variables-expressions/words-to-math-translation/simple-expression-to-words-translation
How Do You Turn a More Complicated Expression into Words? (4:51) http://www.virtualnerd.com/algebra-1/algebra-foundations/complex-expressions-to-words-translation.php
How Do You Turn a Longer Verbal Phrase into an Algebraic Expression? (5:10) http://www.virtualnerd.com/algebra-1/algebra-foundations/translating-words-to-math.php
How Do You Solve a Word Problem by Writing an Equation and Plugging in Values? (4:31) http://www.virtualnerd.com/algebra-1/algebra-foundations/variables-expressions/words-to-math-translation/word-problem-equation-writing-and-evaluation
Properties of Addition and Multiplication
What are the Commutative Properties of Addition and Multiplication? (4:11) http://www.virtualnerd.com/middle-math/number-algebraic-sense/mental-math/commutative-property-definition
What are the Associative Properties of Addition and Multiplication? (5:13) http://www.virtualnerd.com/pre-algebra/algebra-tools/number-properties/commutative-associative-identity-properties/associative-property-definition
What are the Identity Properties of Addition and Multiplication? (2:41) http://www.virtualnerd.com/pre-algebra/algebra-tools/identity-definition.php
Distributive Property
How Can You Distribute Numbers When You're Adding and Multiplying? (5:26) http://www.virtualnerd.com/middle-math/number-algebraic-sense/distributive-property/distributive-property-add-multiply-definition
How Do You Distribute a Number into an Addition Problem to Solve? (3:23) http://www.virtualnerd.com/middle-math/number-algebraic-sense/distributive-property/distributive-addition-example
What is the Distributive Property? (5:45) http://www.virtualnerd.com/pre-algebra/one-two-step-equations/distributive-property/distributive-property-applications/distributive-property-definition
Simplifying expressions using the Distributive Property
How Do You Use the Distributive Property to Simplify an Expression? (4:21) http://www.virtualnerd.com/pre-algebra/one-two-step-equations/distributive-property/distributive-property-applications/distributive-property-examples
Like Terms
What are Like Terms? (7:26) http://www.virtualnerd.com/algebra-2/equations-inequalities/like-terms-definition.php
Simplifying expressions by combining like terms
What is Simplest Form? (4:49) http://www.virtualnerd.com/algebra-1/algebra-foundations/simplest-form-definition.php
How Do You Simplify an Expression? (2:39) http://www.virtualnerd.com/pre-algebra/one-two-step-equations/simplifying-expressions-definitions-examples.php
How Do You Add Like Terms? (4:24) http://www.virtualnerd.com/pre-algebra/one-two-step-equations/simplify-algebraic-expressions/simplify-expressions/add-like-terms-example
How Do You Subtract Like Terms? (5:36) http://www.virtualnerd.com/pre-algebra/one-two-step-equations/simplify-algebraic-expressions/simplify-expressions/subtract-like-terms-example
Factoring expressions using the GCF
What's a Factor? (2:24) http://www.virtualnerd.com/act-math/basics/factors-greatest-common/factor-definition
How Do You Factor a Greatest Common Factor Out of an Expression? (4:57) http://www.virtualnerd.com/pre-algebra/factors-fractions-exponents/factor-out-greatest-common-factor-example.php
Identifying equivalent expressions
What are Equivalent Expressions? (1:10) http://www.virtualnerd.com/algebra-1/algebra-foundations/equivalent-expression-determination.php