Get ready for Algebra 1
https://www.khanacademy.org/math/get-ready-for-algebra-i
Algebra 1
https://www.khanacademy.org/math/algebra
6th grade
Unit: Arithmetic operations
https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-arithmetic-operations
Just stuff I need to learn:
Factors, multiples and patterns
https://www.khanacademy.org/math/cc-fourth-grade-math/imp-factors-multiples-and-patterns
4th grade
Unit: Equivalent fractions and comparing fractions
https://www.khanacademy.org/math/cc-fourth-grade-math/comparing-fractions-and-equivalent-fractions
4th grade
Unit: Addition, subtraction, and estimation
https://www.khanacademy.org/math/cc-fourth-grade-math/imp-addition-and-subtraction-2
4th grade
Unit: Multiply fractions
https://www.khanacademy.org/math/cc-fourth-grade-math/4th-multiply-fractions
Combining like terms: https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:combine-like-terms/v/combining-like-terms-3