Trina,
When my son was 4, I was in the same place you are. Completely unable to keep up! I spent a month or two teaching my son independent study skills. This included "google" so that I didn't have to answer 4000 questions everyday and a couple of on-line learning sights including time4learning.com and Aleks.com.
Our school district refused early admission to K so I had to do the best I could. Now DS is 8. Last year we found a prep style charter school that go 6th-12th grade that was willing to accept my son as a part time student. He went for math, science and language arts, then we homeschooled history and various other strange subjects.
It worked out so well that this year he will be a full time student with classes that run from 7-9th grade. Partial schooling is another option for you to consider.
