It’s common to use DynEd alongside other teaching materials, such as course books, extensive reading series, or test prep materials. Good teachers will take advantage of a variety of materials to engage and re-focus students frequently. To optimize student progress, however, we recommend that DynEd serve as the program core, if possible. It’s also critical to follow the basic pedagogic principles of DynEd’s blended learning approach: that students study DynEd frequently (3+ times per week), and that teachers devote class time each week to personalizing and extending the language students are studying in the DynEd courseware. Using DynEd only as an occasional self-access practice supplement without classroom support is much less effective and not recommended.