1. Rational exponents
2. Roots and rational exponents
http://regentsprep.org/Regents/math/algtrig/ATO1/FractionalExp.htm
3. working with rational exponents
http://regentsprep.org/Regents/math/algtrig/ATO1/Pracratpower.htm
4. Practice evaluating rational exponents
http://regentsprep.org/Regents/math/algtrig/ATO1/praccevalfractpower.htm
5. Adding and subtracting radicals
6. Learn and practice operations with radicals
http://regentsprep.org/Regents/math/ALGEBRA/AO1/indexAO1.htm
7. More about radicals
http://regentsprep.org/Regents/math/algtrig/ATO3/indexATO3.htm