This study compares mathematics instructional practices in classrooms that do and do not contain students with high-incidence disabilities (HIDs). To do so, we examined a national data set of responses from kindergarten teachers about instructional practices. We do find that in classrooms with students with HIDs, teachers reported different frequencies of math activities as well as skills instruction. These differences depended on type of HID. There were no differences in the frequency of time spent on math, meaning that classrooms with and without students with HIDs reported the same amount of math instruction per week. Differences in these findings arose based on teacher qualifications. Implications for policy are discussed.