Meera, an EVS teacher asks students to bring sugar, salt, lemon juice, haldi, flour etc. for an activity to observe dissolving of things in water. Which is the best reason for asking students to bring things on their own A. There is no laboratory or material available in most primary schools. B. There is a need to involve families in student's learning. C. There is a need to involve students so that they construct knowledge easily. D. The students are able to relate their local knowledge with school knowledge. Choose the correct option.?

Option 1 : C and D only

Whenever an experiment is done or demonstrated to the children must be also involved in the experiment equally as a teacher. The teacher taking the control of the classroom and leaving children passive doesn't lead to authentic and effective learning. 

In the above example, the teacher asks the students to bring things on their own because

• While collecting all these things at home the children get an idea of the objects needed for the experiment.
• Children exactly no what is the purpose of experimental and why these objects are being used for that experiment.
• There is a need to involve students so that they construct knowledge with ease and comfort as they already start learning while collecting those things.
• Children feel comfortable experimenting with their things as they have good knowledge about the things they have brought on their own.
• The students will also be able to relate their local knowledge with the knowledge provided in the classroom and school which leads to authentic learning.
• Hands in the above experiment the teacher ask the students to bring the things needed for the experiment on their own.

Hence C & D are the correct options. 

On the other hand, the other two options or wrong as involving students' families and saving the materials in the school laboratory is not the actual objective of the teacher behind this task.