The findings show that in the initial administration of the assessment immediately following the treatment the constructivist group scored slightly higher on both the content and conceptual understanding questions. Of greater significance were the scores at the three-week post treatment assessment. The traditional group averaged a mean score of 9.62 out of 15 on the content assessment at the three-week post treatment test while the constructivist group averaged a mean score of 12.02 out of 15. The 2.40 mean score difference becomes significant given the number of total questions (15). When proficiency is considered a score of 80% or better on the conceptual understanding essay assessment, only 2.9% of the traditional students remained proficient three weeks