Table 1.

Pre and post questions answered incorrectly with difference and rank for each question

Question Subject Areas.	Pre	Post	Difference	Rank
1. Knowledge of contamination sites	11	0	+11	4
2. Contamination of concern in ash sites	33	32	+1	9
3. Define toxicology	11	4	+7	6
4. Toxicant	5	14	−9	11
5.Factors of toxicity	0	4	−4	10
6. Routes of exposure	4	0	+4	7
7. What is a chronic exposure?	4	0	+4	7
8.Recognizing risk assessment process	37	20	+17	1
9. Effective history form/questionnaire	20	4	+16	2
10. Most concerning toxicants in ash sites	35	28	+7	6
11. Is inhalation primary route of exposure?	7	5	+2	8
12. Main exposure route for arsenic	10	1	+9	5
13. Chelation treatment	22	10	+12	3
14. PAHs direct biologic measurement	17	5	+12	3
Total Incorrect Answers	216	127	+88