Okay, I asked what you specifically wanted to know about in Rugby, and you mentioned scrums and scoring points.
Scrums are used to restart play after the ball is not in play but is not because a penalty, out-of-bounds, or score. This is for accidental things such as a knock-on or forward pass. A scrum can be chosen on more serious infractions if it helps the team.
The other team gets to put the ball into the scrum on a re-do if the original scrum is turned 90 degrees.
Points can be scored in multiple ways:
* Penalty kick - when a penalty is awarded a team, the kicker has the option of "kicking for goal". This is worth 3 points
* A drop goal - when you kick the ball through the goal posts while the ball is in play. Worth 3 points
* A try - when you touch the ball down to the ground in the goal area - worth 5 points
* A conversion - you get one chance to kick the ball through the goal posts after a try, and a successful attempt brings you 2 points