Education for all children. Happy teen girls hold triangular rulers. School education. Geometry lesson. Knowledge day. September 1.

Related tags:

• primary school
• math
• elementary school
• school
• kids school
• background school
• background education
• lesson
• educational
• children
• sister
• knowledge
• child education
• childhood
• ruler
• children happy
• friends
• smiling
• pupil
• friendship
• children day
• happy smile
• measure
• background children
• happy
• 19+