Subjects: PERIODICALS; MATHEMATICS; DECIMAL system
Record details
Subjects: TEACHING aids; MATHEMATICS education (Elementary); MATHEMATICS problems & exercises
Subjects: TEACHING aids; MATHEMATICS education; STUDY & teaching of arithmetic
Subjects: MATHEMATICS; ACTIVITY programs in education; TIME
Subjects: ACTIVITY programs in education; TEACHING aids; EXPERIMENTAL methods in education
Subjects: TEACHING; MATHEMATICS; MATHEMATICS teachers
Subjects: MATHEMATICS; TEACHING; MATHEMATICS teachers
Subjects: PERIODICALS; MATHEMATICS education; ACTIVITY programs in educationUNITED States
Subjects: MATHEMATICS education; STUDY & teaching of arithmetic; TEACHING aids
Subjects: ACTIVITY programs in education; EXPERIMENTAL methods in education; MATHEMATICS education