The purpose of this paper is to conduct a meta-analysis of the pedagogical practice of blended learning, or the use of both direct instruction and online learning in second language instruction. A thorough review of the relevant literature over the last two decades on blended learning generally, and second language instruction using blended learning techniques in particular, is presented. Demonstrating the positive benefits from applying blended learning in language instruction, the study results should help guide language instructors in understanding the practice and implementation of this approach. The major conclusions of the study are that blending learning enhances the learner's experience of a new language, and offers greater efficiency in the communication and practice of that language. Efficient and user-friendly technology, with direction instruction and practice in a face to face setting, are seen as the key to successful blended learning language instruction.