The lesson focuses on Personal and Social Development (PSD) for Year 10 students and emphasizes the importance of engaging with material suited to their specific age and development level. It covers topics on sexual health, including methods to prevent STIs/STDs, and discusses common misconceptions about HIV transmission and the risk factors for acquiring STIs. The lesson encourages students to actively participate in discussions and consult with knowledgeable guardians or use reliable resources, highlighting the value of accurate information in sexual health education.