The document provides details of a social science lesson plan about floods taught by ARDRA.R.S to 9th standard division A students. It discusses how floods occur due to changes in river flows, the effects of floods including soil erosion, damage to houses and crops. It aims to help students understand floods and ways to prevent their effects, such as flood control systems. Students learn about floods through presentations and activities including identifying flood impacts and benefits of flood control measures. The lesson emphasizes the importance of floods in providing nutrients to soil and land, while also causing damage, and ways communities can prepare and protect themselves from floods.