- Kindergarten, First Grade
- 65 minutes
Sink or float? This simple lesson has students guess the densities of different objects and place them into water to test their predictions.
Students will learn the relative densities of different objects.
Introduction (10 minutes)
- Ask the students what items they think will sink or float.
- Don't make it specific to the items that you are going to use. Let the students give you a list of random items they think will sink or float.
Explicit Instruction/Teacher Modeling (15 minutes)
- Take out the chart with each object listed.
- Have the students reflect on whether they think each object with sink or float.
- Take votes to see who thinks the item will sink and who thinks the item will float.
- Post the chart to use later for closing the lesson.
Guided Practice/Interactive Modeling (10 minutes)
- Pick two of the objects on the Sink or Float worksheet and test out the predictions with the students.
- Organize students into small teams.
Independent Working Time (10 minutes)
- Have students work with their team to finish the rest of the sink or float activity and determine whether their predictions were correct.
- Enrichment: Have advanced students journal about other objects that might be on the border for the sink or float discussion.
- Support: Give struggling students one-on-one assistance over the course of the lesson.
Assessment (15 minutes)
- Have you students write down about what they predicted and what the outcome was.
Review and Closing (5 minutes)
- Review the predictions. Make changes to the chart if needed.