The following lessons on Khan Academy are capable of being completed with Unit 1.
Exponents with integer bases
Exponents with fractional bases
Signs of expressions challenge
Multiply powers
Powers of powers
Divide powers
Powers of products & quotients
Negative exponents
Multiply & divide powers (integer exponents)
Powers of products & quotients (integer exponents)
Multiplication and division with powers of ten
Approximating with powers of 10
Scientific notation
Multiplying & dividing in scientific notation
Adding & subtracting in scientific notation
Scientific notation word problems