Photo credit: Khan Academy
Khan Acamdemy offers great courses in Math, Science, Engineering, Arts, Humanities, Computing, Economics, Finance, and test preparation. This link will take you to the lessons for Algebra 1, which includes: the foundations, solving equations, solving inequalities, using units, linear equations & graphs, functions, linear word problems, sequences, systems of equations, absolute value & piecewise functions, rational exponents & radicals, exponential growth & decay, polynomials, factorization, quadratics, irrational numbers and more.