Mrz, to continue the quote from where you left off:
'Yet there are still strong opinions on both sides: some favor universal 4 year old kindergarten, others think no 4 year old should be in the traditional public school system, and others think schools can lead quality services for 4 year olds through partnerships with community early childhood programs. Any school district considering operating 4-year-old programs should be fully aware of these issues before moving ahead with the program.' The advisability of teaching 4 year olds anything and the debate in the US doesn't even touch on phonics specifically is ongoing in the US, and it is not accepted as a given that 4 year olds should be in any sort of formal educational setting.
The reference to a long history of teaching 4 year olds that you quoted is a reference to the establishment of America's first Kindergarten, in Watertown, Wisconsin, back in the 18somethings and the vogue for Kindergarten that existed until the early 1900s. From the early 20th century to the present century, Kindergarten attendance was not even mandated.
It remains the case that children do not have to attend any kind of school in Wisconsin until they are 5; the change to 5 from earlier policy will happen only during the 2011-2012 school year. Up to now, school attendance was mandatory only from 1st Grade on (age 6 on) in Wisconsin. The new law makes attendance in 5 yo Kindergarten mandatory (as well as attainment of age 6) for admission to 1st Grade. Parents can opt their children out.
Any 'Kindergarten' classes in operation for 4 year olds in Wisconsin are envisaged to be primarily community based and run in conjunction with school districts. Funding details are outlined here. Wisconsin is apparently broke. 'Based on the reductions in the 2009 state budget process, and the number of districts applying for funding, it is anticipated that no funds will be available for Cycle 3-Year 1.'
Though states in the US may legislate whatever they wish for the individual state education 'system', it is up to individual districts to form their own policies in line with the legislation wrt attendance, exemptions, age requirements, length of school day or days a class meets per week. Preschool programmes vary enormously.
This was published in 2000, but at that point no states required attendance in preschool. Some states (36 in all) required districts to provide Kindergarten and some states (12 in all) required attendance in Kindergarten in 2000. 24 states therefore didn't even require attendance in Kindergarten even though Kdg was offered. With Wisconsin's recent legislation there are at least 13 mandating attendance now, for 5 year olds. Three states in 2000 offered universal preschooling and at least one state (Connecticut) had individual districts that offered preschool (again, Wisconsin adds one more) but it wasn't mandatory. A discussion paper from the Minnesota House of Representatives Legislative Research office on preschool provision including how it operates in various states.
And to reiterate, Kindergarten, the year before 1st Grade, is for 5 year olds. Until education is mandatory for a certain group, accurate statistics on educational attainment or even attendance are not collected by the individual states, and the content of preschool programmes is not scrutinised by the states. (So Project Follow Through data can only be applied to 5 year olds and only to disadvantaged 5 year olds at that -- which is the context of the discussion of what children go to Kindergarten).
Again, Malaleuca, what is the research showing that universal attempts to teach all 4 year olds phonics/ reading is advisable? Why Reception? (The importance of a wide vocabulary reveals itself later in the educational process when children can perhaps decode, but cannot comprehend what they are decoding owing to vocabulary and other deficits.) Children who come from disadvantaged families have been shown to have approximately half the vocabulary (see the studies cited here) of advantaged children at various ages; additionally there is no way phonological awareness and phonemic awareness cannot be impacted by the relative lack of exposure to words among the different groups. I would personally go so far as to say that 'disadvantaged' really means nothing except in terms of language exposure. Yes, children can be taught to read using phonics of any kind at age 4, but is it optimal, and is it ultimately a waste of time, putting the cart before the horse?