Here are the slides from Chris Tuffley’s talk on the seven colour theorem at the 2009 camp. These weren’t really intended as a stand alone document, so you’ll have to fill in some of the gaps yourselves!
Notes on the basic rules of counting, used at various camps.
Introductory notes on graph theory handed out at the 2009 camp.
Some notes on the pigeonhole principle, one of the most fundamental and useful results from discrete mathematics.
These notes by Dr. Arkadii Slinko provide a very thorough grounding in the skills needed to solve Olympiad inequality problems. They also include a number of nice examples.
These notes by Heather Macbeth discuss a useful criterion for the orthogonality of two line segments. They’ll also give you some practice using vectors for geometry.