I am more than a little worried right now, as our DS5, who ought to be starting K this month (but isn't) is starting out with Singapore Math 4A and knows everything in both books, A and B. I think the only thing that DS hasn't ever done is dividing with decimals. I was knew DS was ahead, but for some reason, I though that once we hit 4th grade, things would slow down. But looking ahead at what is covered in 4,5,6th grade, I fully anticipate that by the time he would enroll in first grade, he will be through with 6th grade and I guess ready for Algebra/Pre-Algebra? I am a little overwhelmed and don't know what path to take. My current plan (changing daily - it seems) is to compact 4/5/6th in Singapore, but have him work through all the challenging problem books. I am thinking this will take about a year. (He worked through all of third grade, not using Singapore though, in about six months.) Can any one else on the same trajectory help me know how to plan for the future. What do I do with a 6 year old who will be ready for Algebra if he continues at this pace?