Participants work in groups to develop pushing and probing questions about systems of equations.
(p. 289) Discovering Algebra: An Investigative Approach (Discovering Mathematics) by Jerald Murdock, Ellen Kamischke, Eric Kamischke
(p. 353) Prentice Hall Mathematics, Algebra 1 (Hardcover) by Allan E. Bellman, Sadie Chavis Bragg, Randall I. Charles, Basia Hall, William G., Sr. Handlin
(p. 411) Algebra 1 (Applications, Equations, & Graphs)
by Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff
(p. 687) Algebra: The University of Chicago School Mathematics Project
by John W. McConnell, Susan Brown, Zalman Usiskin, Sharon L. Senk, Ted Widerski, Margaret Hackworth, Daniel Hirschhorn, Lydia Polonsky, Leroy Sachs, Ernest Woodward
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