This article presents the development, rollout, and subsequent uptake of the Alberta Teachers of English as a Second Language (ATESL) document Best Practices for "Adult English as a Second Language (ESL)/Language Instruction for Newcomers to Canada (LINC) Programming" in the light of literature on teacher engagement with second-language acquisition and teaching research. The first part of the Best Practices project was designed to develop a set of best practice statements of principle developed in collaboration with language education experts in Alberta and through the professional literature, as well as with ESL teachers across the province. In the second part of the project, we facilitated the uptake of the principles by teachers and administrators throughout Alberta. (Contains 3 tables.)