DahlR. (1982). The BFG. New York, NY: Puffin Books.
2.
FeldhusenJ., & KolloffP. B. (1986). The Purdue Three-Stage Model enrichment model for gifted education at the elementary level. In RenzulliJ. S. (Ed.). Systems and models for developing programs for the gifted and talented (pp. 126–151). Mansfield Center, CT: Creative Learning Press, Inc.
3.
HertzogN. B. (1995). Investigating the nature of open-ended activities. Unpublished doctoral dissertation, The University of Illinois at Urbana-Champaign.
4.
HertzogN. B. (1997). Open-ended activities and their role in maintaining challenge. Journal for the Education of the Gifted, 21(1), 54–81.
5.
KaplanS. (1986). The grid: A model to construct differentiated curriculum for the gifted. In RenzulliJ. S. (Ed.). Systems and models for developing programs for the gifted and talented (pp. 180–193). Mansfield Center, CT: Creative Learning Press, Inc.
6.
KohnA. (1993). Choices for children. Phi Delta Kappan, 75(1), 8–20.
7.
RenzulliJ. S. (1977a). The enrichment triad model: A guide for developing defensible programs for the gifted and talented. Mansfield Center. CT: Creative Learning Press, Inc.
8.
RenzulliJ. S. (1977b). The Interest-a-Lyzer. Mansfield Center, CT: Creative Learning Press, Inc.
9.
RenzulliJ. S., & SmithL. H. (1978). Learning Styles Inventory: A measure of student preference for instructional techniques. Mansfield Center, CT: Creative Learning Press, Inc.
10.
ScottP. (1987). The constructivist view of learning and teaching in science project. The University of Leeds, Leeds, United Kingdom. (ERIC Document Reproduction Service No. 287-706).
11.
StigginsR. J. (1994). Student-centered classroom assessment. New York: Macmillan College Publishing.
12.
TomlinsonC. (1995). How to differentiate instruction in mixed-ability classrooms. Alexandria, VA: Association for Supervision and Curriculum Development.
13.
TomlinsonC. (1996). Good teaching for one and all: Does gifted education have an instructional identity?Journal for the Education of the Gifted, 20(2), 155–174.
14.
TreffingerD. (1986). Fostering effective, independent learning through individualized programming. In RenzulliJ. S. (Ed.). Systems and models for developing programs (or the gifted and talented (pp. 429–459). Mansfield Center, CT: Creative Learning Press, Inc.