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![Cover for Sandra K. Enger · Assessing Student Understanding in Science: A Standards-Based K-12 Handbook (Hardcover bog) [2 Revised edition] (2009)](https://imusic.b-cdn.net/images/item/original/925/9781412969925.jpg?sandra-k-enger-2009-assessing-student-understanding-in-science-a-standards-based-k-12-handbook-hardcover-bog&class=scaled&v=1605103214)
![Cover for Sandra K. Enger · Assessing Student Understanding in Science: A Standards-Based K-12 Handbook (Paperback Bog) [2 Revised edition] (2009)](https://imusic.b-cdn.net/images/item/original/932/9781412969932.jpg?sandra-k-enger-2009-assessing-student-understanding-in-science-a-standards-based-k-12-handbook-paperback-bog&class=scaled&v=1487010536)