Ironically, my kids are mathy…
It is ironic because their mother is decidedly NOT. We have done basically the same thing with our first four kids, and it seems to work pretty well:
Age 4-6: Calendars, counters (manipulatives), practical math and games
Age 6-7: We blend hands on math with Singapore
About age 7 or 8: We started TT. Some of the kids started in the 4th grade level, some in 3rd. I consider TT about a year behind grade level, but I do the placement test and put them in where they fit (even if it is the middle of the grade level).
We continue to do math drills and supplement with some practical math and workbooks. So far, so good, for us. All of my kids are at or above grade level in math. My 10yo is doing TT7 and my 12yo is doing pre-algebra (placed at Algebra level, but I wanted her to have a good foundation, so that is where we put her).
I should point out that I do make them do the written problem before they enter the answer, and, if they make a score below 90% on a day’s assignment, they re-do the entire assignment.
I am very unconcerned that they won’t have ‘enough’ math continuing at this rate…but that is probably because I have never expected my kids to major in math or attempt college level trig, calculus, and the like. If they have a propensity in those areas in high school, I will turn them over to a tutor.
But I think that, for most homeschooled students, TT works well and is the next best thing to a real life tutor. And I think that if any child shows a skill beyond what your curriculum choice can provide, it is your responsibility to move on so that they can acheive as much as possible in thier education before leaving home. Seems like we would know that before they leave high school!