Fifty Lectures for Mathcounts Competitions (1)
These lectures are based on the MATHCOUNTS Curriculum.
Each lecture includes (1) Basic skills with examples, and (2) Exercises with answer keys.
Solutions to all practice problems can be found here: http://www.amazon.com/Lectures-Mathcounts-Competitions-Solution-Manual/dp/1490973346
Training class is offered: http://www.mymathcounts.com/Copied-2014-Summer-Mathcounts-Training-Program.php