Or very few people do :)
We used Standards. Text, WB, IP, CWP, iExcel, sometimes tests, sometimes extra practice.
I also got the HiG...despite having a masters in math and teaching at the cc for years, I like some of the additional suggestions and explanations.
I also used Miquon in 1 st and 2nd grades.
The extra practice book didn't give enough extra practice. That's when I moved to the tests and just used pages from it when ds needed extra work. I also sometimes used spectrum workbooks for extra drill.
If I could only use one extra, it would be IP. With two, IP and CWP.
I think Singapore did an excellent job of giving ds a solid foundation.
I also see many many students who are weak from not really mastering arithmetic, so I made sure we put in enough time that ds was very solid on his basics.