Pedagogical Rationale & Objectives
This lesson marks an essential transition from organizing word banks and topical lists to comprehending and evaluating continuous expository prose. Students learn the "Umbrella Principle": a main idea title must be broad enough to shelter every sentence in the paragraph, yet specific enough not to promise extraneous information.
Paragraph 1: Archaeology & Ancient Dwellers
Key: b
"Findings in caves have given us many clues as to how ancient people lived. As people have dug through layers and layers of dust, they have found such things as cooking pots, stone axes, weapons, and stone needles..."
✓ (b) Findings in caves give clues about ancient people [CORRECT]
Directly matches the opening thesis. Synthesizes both the material artifacts (axes, pots, needles) and the biological remains (Peking man tooth, hearths).
✗ (a) The Peking man [TOO NARROW]
This is an interesting historical detail introduced only in 1927 in China; it completely ignores the tools, weapons, and cooking pots in the earlier sentences.
✗ (c) Tools and weapons of early people [TOO NARROW]
Only covers the first half of the paragraph; fails to encompass the Peking man or the general archaeological significance of cave digs.
Paragraph 2: Pioneer Sod Houses
Key: b
"Some of the earliest houses on the plains were built of sod. There were few trees, and wood was scarce. As farmers began breaking up the ground for planting crops, they got an idea..."
✓ (b) Early homes on plains were sod [CORRECT]
Accurately states the subject and development of the entire paragraph. Every single sentence describes why sod was chosen, how sod bricks were crafted from grass roots, and the insulation benefits of sod homes.
✗ (a) The plains farmers [TOO BROAD]
The focus is not biographical; farmers are only mentioned as the agents who conceived of using sod bricks.
✗ (c) Life of the plains farmers [TOO BROAD]
A comprehensive title like "Life of the plains farmers" would require passages on agriculture, diet, clothing, social customs, and hardships.
Paragraph 3: Native American Shield Designs
Key: c
"Indians of long ago painted designs on their shields for a good reason. They believed that the designs had a magical power in battle. In their dreams they were shown what kinds of designs to paint..."
✓ (c) Why Indians painted designs on shields [CORRECT]
Directly mirrors the topic sentence ("painted designs on their shields for a good reason") and explains the spiritual conviction of battle protection.
✗ (a) Indian shields [TOO BROAD]
Suggests an encyclopedia entry on shield shapes, materials, and archery physics. The paragraph is tightly concentrated on the painted designs.
✗ (b) The power of Indians' dreams [TOO NARROW]
Dreams are mentioned only as the inspiration source for the visual designs, not as the overall focus.