The book addresses one of the key controversies in teaching foreign language grammar, which is the utility of production-oriented instruction, as exemplified in the PPP sequence, and comprehension-based teaching, as implemented in interpretation tasks and processing instruction. It provides a thorough overview of issues related to learning and teaching grammar, with a particular focus on input-oriented approaches, and reports the findings of four studies which sought to compare their effects with instruction based on different forms of output practice. The findings serve as a basis for guidelines on how the two options can be successfully combined in the classroom.