EV3 programming tutorials

Solutions to common competition problems (when solving a mission)
The following page is an excellent resource for learning more programming concepts to control the robot and sense the environment. It also teaches how to build a competition robot if they would like to design their own. http://ev3lessons.com/lessons.html?lang=en-us

Additionally, by some googling you will find lots of interesting information on the web. Try for instance "ev3 line follower".