I agree with Tim_Lou.
Also, if you haven't got into calculating equilibrium constants yet - but are just looking at Le Chatelier's Principle conceptually, this should be a really good site:
Le Chatelier's Principle
-modest
//edit
One thing the site above does not note, but which will help you is that:
If energy is stated on the left side or reactants side of the equation then it should be taken as an endothermic reaction. If it is on the right side with the products it is an exothermic reaction.
