These videos cover Simple and Compound Interest.
BASIC SIMPLE AND COMPOUND INTEREST - usually covered in Prealgebra and Beginning Algebra
Simple Interest 1 (Introduction): http://youtu.be/bSjWvkOtxEQ
Simple Interest 2 - examples using the simple interest formula: http://youtu.be/atNJSX9qTzU
Simple Interest 3 - examples using the simple interest formula: http://youtu.be/H4k6PMw9ipA
Simple Interest 4 - examples using the simple interest formula: http://youtu.be/rC9SarJfeC8
Simple and Compound Interest Part A - This video computes compound interest using the simple interest formula. The same problem is done in Part B using the compound interest formula: http://youtu.be/Gj09kFje4mc
Simple and Compound Interest Part B - This video computes compound interest using the compound interest formula. The same problem is done in Part A using the simple interest formula.: http://youtu.be/Nv-49GQUeKA
Compound Interest Examples 1: http://youtu.be/cAbidhGVD8I
Compound Interest Examples 2: http://youtu.be/5ryQW45f_94
MORE ADVANCED--appropriate for Intermediate Algebra and beyond using logarithms
Logarithm Application 1 - Compound Interest
http://www.youtube.com/watch?v=pWc0_arPUWs
Logarithm Application 2 - Compound Interest