Buoyancy experiment - SC.mov

Direct Instruction

The learning intention for this lesson was to learn about buoyancy and make a prediction about which objects can float and sink.

The video shows my focus group doing a practical science experiment using a range of objects in pairs to find out which can float and sink in a bowl of water.

They used two containers marked float and sink to sort the objects after they put them into water.

Extended plan here


On reflection I was keen to introduce new language as the children I am working with have a limited vocabulary. Encouraging repetition of new words and adding language to a young child's vocabulary is also crucial to the learning intention of this focus group. Sharing and turn taking of the materials is also important as it develops social skills needed for co operation.

Things to note

Have a discussion prior to the actual experiment is carried out. Talk about predictions and making a hypothesis before the Science experiment begins. What does this mean? This was not included in the video. The prompt question to use: what do you think will happen before we add the object to the water? Will it float to the top or sink to the bottom?

Class Site Content

Learning Intention

For children to follow instructions and listen to the teacher to carry out a practical science experiment following specific steps.


Start the experiment with two large bowls or containers with water on a table or flat surface. Prompt question: Do you think it will float or sink? Is it at the top or bottom? Can you take some photos on your iPad and record what you did for each step in the experiment.

Buoyancy follow up - SC.mov

Learner Generated Content


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Manaiakalani Education Trust

PO Box 18 061, Glen Innes

Auckland, New Zealand