Αγόρι που εργάζονται στο μαυροπίνακα (πίσω όψη) - Φωτογραφίες & Εικόνες Αρχείου

Highly intelligent little boy in the classroom standing on a stepladder to reach a complex mathematical problem on the blackboard that he is busy solving

Primary education. Rear view of a schoolboy solves a mathematical example on a blackboard in a math class. primary school student stands at the blackboard and writes answer to a mathematical example

Primary education. Side view student solves math example on a blackboard in math class. an elementary school student stands at blackboard and writes an answer to an example, thinking about the answer.

Primary education. Rear view of a schoolboy solves a mathematical example on a blackboard in a math class.

Happy child child standing at the blackboard in the school class at the lesson

Surprised kid in glasses gesturing while holding chalk near chalkboard with mathematical formulas

Teacher explaining formula at chalkboard in classroom

Teacher writing formulas on chalkboard in classroom

Close up of woman writing on chalk board, selective focus

Rear view of young woman writing math equation on chalk board

Rear view of three young schoolgirls writing on chalk board

Teacher writing formulas on chalkboard in classroom

Young Teacher leaning against chalk board