An excellent source of enrichment in mathematics comes in the form of booklets produced by the Australian Maths Trust (AMT). These are called "Mathematics Challenge for Young Australians" and are available for various year groups. They go by the names :
Ramanujan (4+5), Newton (5+6), Dirichlet (6+7), Euler (7+8), Gauss (9), Noether (9+10), Pólya (10),
and can be obtained directly from the AMT or you can ask your school to obtain them. Each category comes as three separate volumes, namely, "Student Notes" which contain background theory and examples, "Student Problems" and "Teacher Reference Notes".
Swinburne (Melbourne, VIC)
University of Melbourne (Melbourne, VIC)
UNSW Mathematics Enrichment Club (Sydney, NSW)
USQ Mathematics Enrichment (Springfield, QLD)
UWA (Perth, WA)
Alfred Deakin High School (Bácskai)
Canberra enrichment opportunities (Carty 2013)
Hawker College (Sheikh-Buchholz)
Yarralumla Primary School - ChaMPS (Bácskai-Price)
Allan : Elliptic Curves ... (coming soon)
: Statistics ... (coming soon)
David : Continued fractions
Ellen : Invariants
Fiona : Games and invariants
Peter : Mathematical Structures I ...
: Mathematical Structures II ...
ραλφ : Edge Series
Tamiru : Geometry and Number theory
Tryon : Locker up
: Infinity ...
Zoltán : Counting paths on a chessboard ...