It all depends on how it is implemented, the beliefs of the teachers, the level of support needed by the students, whether any other adults support the room for all or part of the day, and how instruction is organized. If most instruction is large group, this is not a great situation (although I would argue that large group instruction is generally the least effective route anyway). If most instruction is small group, this could potentially be a better situation than a single teacher classroom, assuming the two teachers share ownership for the whole class and work well together. A smart special education teacher is a pro both at recognizing when the regular curriculum is not a fit, and in individualizing both in advance and on the fly. Also, more adults means smaller instructional groups where it's easier to target instruction to different ability levels and interests. No guarantees of course....I hope it works out well for your DD.
