If you have several students that struggle and they are in the same grade, you can keep them on the same lesson and explain concepts to them together. If that is not possible, still explain concepts to them together and often your explanation will come back to them when they encounter that concept, even if it is several weeks later.
Depending on the curriculum you use you can record spelling/word building self-tests and tests to an mp3 player, allowing students to take them with minimal teacher time required.
Teach your students to “bounce books” or continue working in other subjects when they are unable to figure out a problem or they are waiting on something from you. When you do get to them fifteen minutes later they may have several things ready for you that you can take care of in one stop rather than coming back several times.
However, the primary solution to your question is much bigger than efficiency tips that anyone can give you. Here are some keys that need built into a school over months and years for an individualized curriculum to work: 1. Build your students’ reading abilities. Students who can’t read well struggle in an individualized setting, making a tremendous load for the teacher. 2. Teach your students to try, try, try again. Too many students give up after one or two tries which increased their dependency on a teacher. Make sure a student has stretched their problem-solving efforts before you help them. When you do help a student, be careful to lead them to discovery rather than giving them answers. How you help a student greatly affects their approach to future problems. 3. Make sure they read directions. Ask them to read the directions to you before you help them. This simple step removes a surprising amount of questions that get asked of teachers. 4. Require fluency in math facts. Neither you nor the student have time to waste even 10 seconds figuring out 6×8 or other facts. Too often simple math fact errors cause big problems in algebra and other math. 5. Don’t allow students to move past a concept until they have mastered it. When you are under pressure it is tempting to keep pushing a student as long as they can pass the tests. I have seen many students who could pass tests but still didn’t know the content. Then several books or grades later they (and you) have big problems to figure out. Take the time to work on concepts now so they don’t snowball later. 6. Learn to know the curriculum that you are teaching well. Keep a list of difficult books and concepts that cause problems or are not explained well. Keep worksheets or exercises handy that can reinforce weak spots or difficult concepts. 7. Teach your students basic study skills. Students who learn how to search for answers by scanning for key words, highlight a key section for later review, or come back to a problem after a five minute break have gained valuable life-skills and make your job easier.
While these concepts are important in all schools, they are critical for success in an individualized setting.