CURRICULUM
LESSON 3 WATER PURIFIER Now that the students have an understand- ing of the availability of clean water they can begin looking at solutions or ways that they can help. This builds on their citizenship learning and supports them to feel empathy.
OBJECTIVES:
• Ask questions that lead to investigations of living things, objects, and events in the immediate environment.
• Identify practical problems to solve in the immediate environment.
• Access information using a variety of sources. Examples: elders, simple chap- ter books, concept books, CD-ROMs, Internet...
• Create, with the class, a plan to solve a problem or meet a need. Examples: identify simple steps to follow, prepare a drawing of the object to be constructed...
• Follow simple directions, and describe the purpose of steps followed.
• Construct an object or device to solve a problem or meet a need.
• Test an object or device with respect to pre-determined criteria.
ACTIVATE: Have students log onto the classroom blogs and comment/respond to
38 ETFO VOICE | SPRING 2020
each other’s reflections after their skype connection with the Northern communi- ty. Through discussion, have the students share their thinking with others. Watch the 1 minute video
youtu.be/GSiLTFcWzqg to see how one resident has to walk to her Aunt’s house to get water and how she feels when the water truck finally comes to her house after 3 months.
ACQUIRE: Arrange the students in pairs or groups and have them brainstorm possible solutions or ways to help the Northern communities with their lack of access to clean water. Give students 30 minutes to research on the internet other possible solutions using a search engine such as Nettrekker that is designed to find websites that are appropriate for children. After 30 minutes are up have each group prepare a 1-2 minute verbal presentation trying to encourage their classmates that this is the best option to help Northern communities.
APPLY: After learning about all of the creative ideas that students have shared, introduce the idea of a water filter. A homemade water filter is meant to repli- cate the natural purification that happens in our environment. Each student will cre- ate and test their own filter (Appendix 3).
The following materials are needed: • plastic water bottles or pop bottles • coffee filters • gravel • sand • rocks • dirty water (water mixed with soil)
Step 1: Cut the bottle in half. Insert the top half into the bottom to look like a funnel.
Step 2: Line the bottom of the funnel shaped part of bottle with coffee filter.
Step 3: Add sand (amount will depend on size of bottle but should cover about 2 inches of bottom of filter).
Step 4: Add the same amount of gravel. Step 5: Add rocks to finish off the filter.
Step 6: Pour some of the dirty water into the bottle. Watch as the water drips out the bottom clearer than it went in.
Step 7: Repeat this process until water is clear.
The following videos show the creation of the water filter:
youtu.be/RqWV7ozfFNQ or
youtu.be/ ZNyhY9dR2VE
Once filters are complete, have students draw a picture of their water filter and ex- plain how it works to check for understand- ing (Appendix 3).
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