This mixed-methods study examines the language ideologies of 28 preschool educators in their first month transitioning from English-only to dual language education (DLE). Using the language ideology survey developed by [Fitzsimmons-Doolan, S. (2011). "Language ideology dimensions of politically active Arizona voters: an exploratory study." "Language Awareness" 20 (4): 295-314; Fitzsimmons-Doolan, S. (2014). "Language ideologies of Arizona voters, language managers, and teachers." "Journal of Language, Identity, and Education" 13 (1): 34-52], we analyzed the preschool teachers' language ideologies, as well as the relationships between the ideologies and demographic and experiential variables. We found that teachers generally held pro-multilingual ideologies, but that particular ideologies correlated with different teacher experiences. For instance, while teachers' level of education and having studied a language other than English were positive correlates of pro-multilingual beliefs, years of teaching overall was instead positively associated with viewing "English as a tool" and years at the current placement was positively related to viewing "multiple languages as a problem." Neither general teaching experience nor experience having a home language other than English was a significant predictor of pro-multilingual beliefs. Qualitative analysis of transcripts from teacher focus groups reflected teachers' pro-multilingual beliefs, but also showed teachers' concerns with DLE implementation. We found, however, that these concerns were practical -- balancing district priorities; managing new divisions of labor in the classroom -- rather than ideological. Our findings highlight the theoretical and methodological importance of viewing teachers' experiences, ideologies, and classroom language policies as connected.