Off2Class is a robust, well-rounded, PowerPoint-style curriculum. It includes all of the necessary components in every lesson: reading, writing, listening, and speaking. There are grammar points in every lesson and every lesson lists "Can Do" statements to tie in real world lesson goals. Check out their blog for tips on how to get the most out of this program, and learn about online teaching in general.
Students can interact with the slide by typing or drawing on it. You can embed videos or pictures or draw on a blank whiteboard. Check out the main teaching online page for professional development about this curriculum!