Begin by introducing the concept of seed plants, highlighting the two main types: gymnosperms and angiosperms. Explain the significance of gymnosperms as non-flowering plants with 'naked seeds'.

Discuss the main groups of gymnosperms, including conifers, cycads, and ginkgos. Highlight their unique characteristics and ecological roles.

Use the video 'Gymnosperms' to illustrate the ecological roles of gymnosperms, such as providing habitats and preventing soil erosion. This video supports understanding of plant biology and ecosystems.

Explore the ecological significance and adaptations of giant sequoias. Discuss their role as the world's largest trees and their adaptations like thick bark for fire protection.

Watch the video 'Giant Sequoias – Forest Skyscrapers!' to understand the unique adaptations and ecological significance of these ancient trees.

Engage students in a classification activity where they identify and categorize different gymnosperms based on their characteristics.

Use the 'Gymnosperm Life Cycle' assessment to help students understand the stages of gymnosperm development through a cut-and-paste activity.

Assign students to research and create a presentation on the historical and environmental importance of cycads and ginkgos.

Conduct a class discussion to review the characteristics and reproduction process of gymnosperms. Encourage students to share their findings from the independent practice.

Have students reflect on the ecological significance of gymnosperms and their adaptations. Discuss how these plants have survived for millions of years.

Use the 'Plant Classification – Comprehension' assessment to evaluate students' understanding of plant diversity and classification.

Encourage students to take the unit quiz to test their comprehension of the topic.