author
An early 20th-century educator and textbook writer, best known for bringing formal reasoning into everyday classroom practice. His surviving books show a practical mind focused on helping teachers explain logic and arithmetic clearly.

by George Hastings McNair
George Hastings McNair was an American education writer born in 1868. The surviving catalog records tied to his books identify him as the author of A Class Room Logic (1914), Timely Lessons on Today's Living, and Methods of Teaching Modern Day Arithmetic (1923).
The title page of A Class Room Logic presents him as "Ph.D." and describes him as head of the department of logic and mathematics at the City Training School for Teachers in Jamaica, New York City. That fits the character of his work: he wrote for teachers, and he was interested in making subjects like logic feel useful in real classrooms rather than abstract or remote.
Because reliable biographical information about his life appears to be scarce online, much of what can be said about him comes through his books. Even so, those works suggest a teacher deeply interested in clear thinking, sound instruction, and the practical side of education in the early 1900s.