Begin with a discussion on how technology has evolved to allow us to print objects, not just pictures or text. Engage students by asking them to imagine what they would create if they had a 3D printer.

Explain the basic process of 3D printing, emphasizing the heating and cooling of materials to form solid objects. Use diagrams or animations to illustrate how a 3D printer works.

Discuss the various objects that can be created using 3D printers, such as toys, car parts, and even food. Highlight the practical applications in fields like engineering and medicine.

Watch a video demonstrating a 3D printer in action to help students visualize the process. This will reinforce their understanding of the heating and cooling cycle in 3D printing.

Engage students in a discussion about how engineers use 3D printing to test models before creating real objects. Encourage them to think about the benefits of this practice.

Conduct an activity where students use modeling clay to create simple 3D models. This hands-on experience will help them understand the concept of building objects layer by layer.

Use the 'Taking Apart and Putting Together' assessment to explore concepts of construction and deconstruction, reinforcing their understanding of spatial relationships and creativity.

Assign a task where students research different types of 3D printed objects and their uses. They can present their findings through a short presentation or a poster.

Use the 'Properties and Temperature' assessment to evaluate students' understanding of how materials change with temperature, reinforcing concepts learned in the lesson.

Facilitate a class discussion to reflect on what students have learned about 3D printing. Encourage them to share their thoughts on how this technology could impact the future.

Administer the 'Review – Changes to Matter' assessment to test students' comprehension of the lesson's key concepts, including the physical changes involved in 3D printing.