I love ice hockey but just started watching last season. I don't understand it all yet. 
I see, well its a simple game really. Two teams compete to shoot a rubber puck into the opponent's goal to score points!
That does sound easy. How do they get a penalty? I have seen people go to the box but unsure why. 
Its due to foul play by the opposition, sometimes when a move is seem as being too fast-paced and physical, the referee gives a penalty!
And how does overtime work, that still confuses me too!
Overtime
Overtime is the amount of time someone works beyond normal working hours. The term is also used for the pay received for this time. Normal hours may be determined in several ways:
- by custom (what is considered healthy or reasonable by society),
- by practices of a given trade or profession,
- by legislation,
- by agreement between employers and workers or their representatives.
Most nations have overtime labour laws designed to dissuade or prevent employers from forcing their employees to work excessively
Ice hockey
Ice hockey is a contact team sport played on ice, usually in a rink, in which two teams of skaters use their sticks to shoot a vulcanized rubber puck into their opponent's net to score points. The sport is known to be fast-paced and physical, with teams usually consisting of six players each: one goaltender, and five players who skate up and down the ice trying to take the puck and score a goal against the opposing team.
Ice hockey is most popular in Canada,