Notes
1. Diana Bocco, "How Much Trash Does One Person Create in a Year?", wiseGeek.com, http://www.wisegeek.com/how-much-garbage-does-a-person-create-in-one-year.htm (accessed July 13, 2008)
2. Bernice McCarthy, The 4MAT System; Teaching to Learning Styles with Right/Left Mode Techniques. (Barrington, IL: EXCEL, Inc., 1980), 94.
3. Liping Ma. Knowing and Teaching Elementary Mathematics. (Mahwah, NJ: Lawrence Erlbaum Associates, Inc., 1999), xi.
4. Roger Howe. "Taking Place Value Seriously: Arithmetic, Estimation and Algebra." http://www.maa.org/pmet/resources/PlaceValue_RV1.pdf (accessed July 15, 2008)
5. Howe.
6. The Environmental Protection Agency, "The Quest for Less: Classroom Activity: A Landfill is No Dump!" http://www.epa.gov/epaoswer/education/quest/pdfs/unit2/chap4/u2-4_nodump.pdf (accessed July 15, 2008)
7. Dictionary.com Unabridged (v 1.1) http://dictionary.reference.com/browse/magnitude (accessed July 16, 2008)
8. Don Fraser. Current, Best Strategies for Strengthening Math Computation and Problem Solving Skills (Grades 4-8). (Bellevue, WA: Bureau of Education & Research, 2005), 20.
9. Ma.
10. Helen Nolan. How Much, How Many, How Far, How Heavy, How Long, How Tall is 1000? (Tonawanda, NY: Kids Can Press, 1995), 9.
11. David M. Schwartz. How much is a million? (New York: Lothrop, Lee and Shepard Books, 1985), 11.
12. Rusty Bressler. Math and literature, grades 4 - 6, 2nd edition. (Sausalito, CA: Math Solutions Publications, 2004), 97.
13. Burns.
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