Many students with disabilities (SWD) are not meeting proficiency, and achievement scores disaggregated by disability status show that SWD are often not meeting progress targets established by states. A survey was developed to collect data from 218 general and special educators to analyze trends in teachers' attitudes and practices that may be affecting the educational experience and achievement of many SWD. Results of these analyses provide information regarding the attitudes of teachers toward the ability of SWD and the fairness and validity of high-stakes testing. Teachers' attitudes toward the ability of SWD, teacher classification, and the amount of teacher training were all found to be predictors of the use of evidence-based practice. The attitude of teachers toward the ability of SWD to learn and achieve higher level thinking was found to predict proficient scores of SWD on the New England Common Assessment Program achievement test.