Title: Line and circle =
Subjects: Juvenile literature, Shapes, Form perception in children, Geometry concept, Aids and devices, Teaching, Persian language materials, Form perception, Geometry, Shape, Bilingual, Form perception, juvenile literature, Size and shape, Arabic language materials, Chinese language materials, Teaching Materials, Matériel didactique, Formes, Ouvrages pour la jeunesse, Perception des formes chez l'enfant, Géométrie chez l'enfant, Instructional materials