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According to College Board Summary Reports:
- 74% of Dr. Siebens' students earned scores of 3 - 5 (eligible for college credit) on the AP Biology exam over the last ten years.
- On the 2007 AP Biology Exam, 41 of the 43 (95.3%) students with scores of 3 - 5 throughout DCPS were students of Dr. Siebens. 65% of the DCPS students who earned a 2 (learned a substantial amount, but not enough for college advanced placement credit) were taught by Dr. Siebens.
- On the June 2007 AP exam, all seventeen DCPS students who received the highest score of 5 on the AP exam were students of Dr. Siebens.
- 29% of Dr. Siebens' AP Biology students received a score of 5, or 1.7 times the national average of 17%.
(Of course Dr. Siebens teaches many non-AP courses, but the AP test provides a robust metric.)
Whatever he does in his classroom, it is working very well and students are learning. The impact his teaching has had on his students and their parents is so clear from scrolling the COMMENTS section of the Petition to Reinstate Dr. Siebens, including many former students are now pursuing careers in medicine and research because of him.
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