Dva žáci na chemii lekce stojí poblíž tabule - Stock fotografie a obrázky

Two pupils at chemistry lesson are standing near blackboard

Two pupils at chemistry lesson are standing near blackboard

Three excited funny children after chemical experiment in lab

Very smart schoolgirl with chalk standing near blackboard in the laboratory classes in chemistry and wants to white. Focus on the microscope

Young students in chemistry class - doing the chemical yoyo experiment

Amazed friends in goggles looking at flask with red substance in laboratory

Three excited funny children after chemical experiment in lab

Very smart schoolgirl with chalk standing near blackboard in the laboratory classes in chemistry and wants to white. Focus on the microscope

Schoolgirl with chalk standing near blackboard in the laboratory classes in chemistry and wants to white. Focus on the microscope

Thoughtful schoolgirl standing near blackboard in the laboratory classes in chemistry

Very smart schoolgirl with chalk standing near blackboard in the laboratory classes in chemistry and wants to white. Focus on the microscope

Thoughtful schoolgirl standing near blackboard in the laboratory classes in chemistry

Schoolgirl with chalk standing near blackboard in the laboratory classes in chemistry

Thoughtful schoolgirl standing near blackboard in the laboratory classes in chemistry

Thoughtful schoolgirl standing near blackboard in the laboratory classes in chemistry

Scientist is doing research at the work, man holds the test tube with liquid

Very smart schoolgirl with chalk standing near blackboard in the laboratory classes in chemistry and wants to white. Focus on the microscope