Working as a tutor in college, I learned the concept of "drill and kill." When a student was having a problem with any concept we drilled it until they knew it like their own name. What I found to be the biggest problem among my students was they got stuck on one concept they didn't grasp, the class moved on and they fell further behind. Children who have language processing issues, speech and Language issues or English is not their first language suffer when they don't understand grammar. After all, no matter what subject you are taking, science, math, history, etc., the directions and...