Grades 3,4. Science.
Grades 3,4. Science.
Grades 5,6. Science. Production.
Grades 7,8. Science. End Uses.
Grades 3 and 4, science, production
Grades 7,8. Science.
Grades 7, 8. Production. Language Arts. Covers diseases, pests and other problems.
Grades 7,8. Social Studies. Exports.
Grades 7, 8. Science. Processing.
grades 7 and 8, Science, production

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