Begin the lesson by introducing the concept of electromagnets and their importance in everyday life. Use real-world examples such as MRI machines and electric bells to capture students' interest.

Explain how the number of coils affects the strength of an electromagnet. Use diagrams to illustrate the difference in magnetic strength with varying coil numbers.

Discuss the role of magnetic materials in enhancing electromagnet strength. Highlight the difference between using a metal core and no core.

Watch a demonstration on how adding more batteries can increase the strength of an electromagnet. Discuss the relationship between electric current and magnetic force.

Engage students in identifying practical applications of electromagnets in devices like speakers and doorbells.

Have students build their own electromagnet using a battery, wire, and a metal nail. Encourage them to experiment with different numbers of coils and batteries.

Use the 'Electromagnet Challenge' assessment to guide students in designing and testing their electromagnets.

Assign the 'Electromagnets – Comprehension' worksheet for students to complete individually, reinforcing their understanding of electromagnet strength factors.

Conduct a class discussion to review key concepts. Ask students to share their findings from the hands-on activity and independent practice.

Have students reflect on what they learned about electromagnets and their practical applications. Encourage them to think about how these concepts apply to real-world scenarios.

Use the 'Review – Electricity and Circuits' assessment to evaluate students' understanding of the unit.

For students who excel, provide extension activities such as researching advanced applications of electromagnets in technology.