Applied Electrical - Please Help

I've just started this course in "applied electrical" technology - d.c. circuits which i'm learning:

- Basic electrical concepts, basic electrical circuits, Ohms law, electrical power, effects of an electric current, e.m.f, resistors.

I dont have the teextbook and im behind in class. I have a test in a couple of days.

1. Please provide a websites that has information regarding the above topics.

Thank you in advance