Cool Hunt.

Pros:

• It is free and accessible. It costs absolutely nothing to watch videos and work on problems.
• There are a wide variety of subjects available. There are videos about math, biology, chemistry, and physics.
• Students can learn and work at their own pace. They can fast forward, rewind, repeat videos, stop and work out a problem on their own.
• It provides an incredible amount of math problems for a variety of grade levels.

Cons:

• It lessens spontaneous creativity. khan Academy, by nature, takes away some of the creativity and innovation that develops as you learn. It can only instruct; it cannot inspire and guide you to come to a solution on your own.