Bieniek, D. (1997). One Minute Challenges, Math and Reasoning. U.S.A.: Troll Communications L.L.C.
Bolt, B. (1982). Mathematical Activities. Cambridge: Cambridge University Press.
Cathcart, W. G., Pothier, Y., James, H. (1997). Learning Mathematics in Elementary and Middle Schools, Second Edition. Scarborough, Ontario: Prentice Hall Allyn and Bacon Canada.
Cornelius, M. and Parr, M. (1991). What's Your Game. Cambridge: Cambridge University Press.
Rice, S., Hardesty, L., and Fannin, B. (1979). Time Out for Math. Nashville: Incentive Publications.
Saskatchewan Education. (1997). The Evergreen Curriculum. Regina, SK: Saskatchewan Education.
Schiro, M. (1978). 33 Arithmetic Skill Development Games. Belmont, California: Fearon, Pitman Publishers.
Ideas for a number of activities came from a magazine called "The Arithmetic Teacher", the official journal of the National Council of Teachers of Mathematics.
Specific magazines used for these activities were:
December 1977 - Volume 25, Number 3
March 1981 - Volume 28, Number 7
March 1980 - Volume 27, Number 7
October, 1984 - Volume 32, Number 2
April, 1993 - Volume 40, Number 8