What is the problem? (1900-1962)
What should children do in school?
Ahead of its time : the beginnings of open court reading (1962-1967)
Selling reform with guarantees (1966-1973)
Trying to sell a principled program (1966-1973)
Gaining credibility (1968-1974)
Math : forward to thinking, not back to basics (1971-1984)
Working bottom-up and top-down (1975-1985)
Research, resistance, renewal (1978-1985)
Selling reform by disguise : the move toward the middle (1983-1989)
Counterfeit reform (1985-1988)
Whole language and CYS (1987-1996).