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A. Agriculture
By the end of 2nd grade, students should know that:
- Most food comes from farms either directly as crops or as the animals that eat the crops.
- Part of a crop may be lost to pests or spoilage.
- A crop that is fine when harvested may spoil before it gets to consumers.
- Machines improve what people get from crops by helping in planting and harvesting, in keeping food fresh by packaging and cooling, and in moving it long distances from where it is grown to where people live.
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B. Materials and Manufacturing
By the end of 2nd grade, students should know that:
- Some kinds of materials are better than others for making any particular thing.
- Several steps are usually involved in making things.
- Tools are used to help make things, and some things cannot be made at all without tools.
- Some materials can be used over again.
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C. Energy Sources and Use
By the end of 2nd grade, students should know that:
- People can save money by turning off machines when they are not using them.
- People burn fuels such as wood, oil, coal, or natural gas, or use electricity to cook their food and warm their houses.
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D. Communication
By the end of 2nd grade, students should know that:
- Information can be sent and received in many different ways.
- Devices can be used to send and receive messages quickly and clearly.
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E. Information Processing
By the end of 2nd grade, students should know that:
- There are different ways to store things so they can be easily found later.
- Letters and numbers can be used to put things in a useful order.
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F. Health Technology
By the end of 2nd grade, students should know that:
- Vaccinations and other scientific treatments protect people from getting certain diseases, and different kinds of medicines may help those who do become sick to recover.
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