According to Carroll, Davies, and Richman (1971) and Adams (1990), children will be expected to recognize and know well over 80,000 different
words by the end of third grade.
Word from a practitioner in the field: «We see the devastating impact
of the differences in preschool and early learning opportunities when children arrive to kindergarten: almost half
of children entering kindergarten do not yet have the predictive skills they need to be successful and joyful readers
by the
end of third grade.