Teachers' difficulties in arithmetic and their correctives
By: by Ruth Streitz ...
Series: [University of Illinois] College of education. Bureau of educational research.  Bulletin; no. 18
Publisher: University of Illinois
Published: 1924
Place of publication: Urbana
Language: eng
Number of pages: 34
Subjects: Arithmetic -- Study and teaching.
Notes: On cover: University of Illinois bulletin.  vol. xxi, no. 34.