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Grade 12 Maintaining Water Systems Task: 40 Minutes


TWELFTH-GRADERS CAN DO DETAILED EXPERIMENTS BUT ARE CHALLENGED TO EXPLAIN THEIR REASONING Watch Maintaining Water Systems. See highlights of students taking the task. Duration: 4.5 minutes.  

For this task, grade 12 students were asked to investigate the best site for building a new town based on the quality of a given water supply. Using the provided laboratory equipment and materials, students had to test water samples for levels of specific pollutants and evaluate water treatment processes.

  • See how selected student groups performed on the five steps of this task.
  • See test administration and scoring materials for this hands-on task.



    SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.