Restored skills, by tutorial

gistfile1.txt

This list is taken from my dev datastore so it might be slightly out 
of date compared to the live site, but it's a good approximation.

Exponent properties
    	simplifying_expressions_with_exponents
	simplifying_rational_expressions_1
Factoring quadratics in two variables
	factoring_polynomials_with_two_variables
Factoring simple expressions
	factoring_linear_binomials
Getting a feel for equations and inequalities
	dependent-and-independent-variables
	solving-equations-and-inequalities-through-substitution
Logarithm basics
	logarithms_1
	logarithms_1.5
Logarithm properties
	logarithms_2
Multiplying binomials
	multiplying_expressions_0.5
	multiplying_expressions_1
Radical equations
	radical_equations
Ratios and proportions
	writing_proportions
	proportions_1
	proportions_2
Variables and expressions
	evaluating_expressions_1
	evaluating_expressions_2
	evaluating-expressions-3
Manipulating expressions
	combining_like_terms_1
	combining_like_terms_2
	manipulating-linear-expressions-with-rational-coefficients
	equivalent-forms-of-expressions-1
Writing and interpreting expressions
	writing_expressions_1
	writing_expressions_2
	interpreting-expressions
	writing-expressions-3