Outline a lesson plan that you can use to teach a Grade 6 topic under Matter and Materials using cooperative learning as a teaching strategy.

Given the community's limited funding and the issue of muddy river water after heavy rainfall, filtration is the most suitable purification method.

• Addresses turbidity: Filtration directly removes suspended solids (mud) from the water, which is crucial as heavy rainfall makes the river water muddy. Removing turbidity improves the water's aesthetic quality and makes it more palatable and acceptable for drinking, cooking, and washing.
• Removes pathogens: While not all, filtration effectively removes larger pathogens like protozoa (e.g., Giardia, Cryptosporidium) and many bacteria that are often associated with suspended particles and cause water-borne diseases.
• Cost-effectiveness and sustainability: Simple filtration systems, such as slow sand filters, can be constructed and maintained using local materials and labor. This makes them a highly cost-effective and sustainable solution for a community with limited funding, compared to the ongoing fuel costs of boiling or the chemical supply needs of chlorination, especially when dealing with highly turbid water.

The most suitable method is:

• Filtration