IEW has a grammar program called Fix It! Although it may look simplistic at first sight, it is actually very flexible and thorough. You can make it as in depth as you like. It covers grammar and editing, has explanations in the teacher's guide, and it builds from easy to harder concepts in a seamless manner. I have used it with all four of my children, three of them have graduated. They all did do very well on the SAT, even one National Merit Scholar who often thanks me for using IEW! I also used their writing program, the video classes are just an introduction. They have many other courses that are not video based. For literature, I use EIL - Excellence in Literature.