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ORC Resource Number #11329
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NAEP Assessment Item, Grade 12: Determine the initial number of bacteria in a sample (calculator available)
PROFESSIONAL COMMENTARY

Given an equation for exponential growth, students are asked to find the initial population. This multiple-choice question is a "hard" test item used in grade 12 in the 2005 National Assessment of Educational Progress (see About NAEP). The URL link (above) takes the user to the NAEP test item, with access to performance data by various subgroups of students, a scoring key, and discussion of the content on which the item is based. The NAEP website allows users to build their own printable database of test items by clicking on Add Question in the upper right hand corner of the screen. NAEP Reference Number: 2005-12M12, No. 14. (sw)

OHIO STANDARDS
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Mathematics Academic Content Standards
Patterns, Functions and Algebra Standard
NATIONAL STANDARDS
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Principles and Standards for School Mathematics
Algebra Standard
RESOURCE TYPE
Assessment Resource
STANDARDS ALIGNMENT
Grades 9–12
TOPICS
Mathematics --
Algebra;
Nonlinear functions;
Assessment;
KEYWORDS
exponential growth
Publisher: National Center for Education Statistics (NCES), National Assessment of Educational Progress (NAEP)