Jamilyn Castillo uses tubes, filled with colored beads, to work on a math problem, in her 2nd and 3rd grade class, Monday morning, September 15, 2008, Lincoln Elementary School, 710 S. Pennsylvania St. Denver. Lincoln emerged as the top school in DPS, und
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Jamilyn Castillo uses tubes, filled with colored beads, to work on a math problem, in her 2nd and 3rd grade class, Monday morning, September 15, 2008, Lincoln Elementary School, 710 S. Pennsylvania St. Denver. Lincoln emerged as the top school in DPS, und (09/15/2008), [437065630] . Denver Public Library Digital Collections, accessed 08/09/2026, https://digital.denverlibrary.org/nodes/view/901699