Khan Academy
Khan Academy: Manipulating Expressions Using Structure
Given that a+b=0, Sal finds an expression equivalent to a*b. [1:34]
Khan Academy
Khan Academy: Identifying Quadratic Patterns
Determining whether a polynomial expression can be factored using the perfect square pattern or the difference of squares pattern (or neither). [5:50]
Virtual Nerd
Virtual Nerd: Interpret the Structure of Expressions
This site teaches students how to interpret expressions that represent a quantity in terms of its context, interpret parts of an expression, such as terms, factors, and coefficients, and use the structure of an expression to identify...