Marion Joseph, whose concern about her grandson’s struggles as a first grader propelled a back-to-basics approach to teaching reading throughout the country, died on March 24 at her home in Walnut Creek, CA. She was 95.

Ms. Joseph exerted her influence on education by shifting the emphasis in reading instruction to phonics, the sounding out of vowels and consonants in words, and away from the so-called whole-language approach, which focuses on the meaning and context of words in literature.

She had no formal training in education but immersed herself in the methodology of teaching literacy when she learned that her grandson, Isaac, was being given difficult reading assignments without being taught to parse the words by sounding them out phonetically. Through phonics, she insisted, children learn to read and write primarily by putting individual letter and vowel sounds together.

Responding in large part to her advocacy, a California task force focused on improving reading instruction, agreed to restore phonics to the curriculum. Other states followed.

As for Isaac, whose struggle with reading in the first grade prompted Ms. Joseph’s phonics crusade, most of the literature he now consumes comes from audiobooks, he said.