Here are some links to websites which you may find helpful if you are finding the material we are going over hard to understand.
Check out Georgia Public Broadcasting Science site. They go through most of the topic we teach in small 20-30 minute segments.
This is a science teacher in Montana who has made lots of videos for his own classes. You may find his explanation easier to understand then mine.
Khan Academy is a good source for explanations in chemistry and physics.
Science Geek is a good resource for Chemistry related topics.