Is there a topical math program for the younger years?

[mo2]

Like Key to... series but starting even earlier, with addition, substraction, mutiplication, division, etc?  I know the Math Mammoth Blue series is set up like this, but are there any others?

[EKS]

Math U See

[TX Native]

Khan Academy videos might fit the bill.

[Chelli]

Miquon can be this way if you buy all the books and follow one thread (addition, subtraction, fractions, time, etc.) through all the books before going back to the beginning and starting a different thread. Miquon covers first through third grade concept wise.