Photo de stock - At the direction of their teacher (left background) high school chemistry students place their cell phones on her desk before class in San Clemente, CA, in an example of classroom management.

Photo de stock: At the direction of their teacher (left background) high school chemistry students place their cell phones on her desk before class in San Clemente, CA.

Mots-clés utilisés

Choisir des mots clés multiples