Integrate quantitative data with qualitative accounts, assess how well reasoning and evidence support an author's claims, compare several sources and read grades 9-10 history texts independently

Learning goal: Integrate quantitative or technical analysis, such as charts and research data, with qualitative analysis in print or digital text; assess the extent to which the reasoning and evidence in a text support the author's claims; compare and contrast treatments of the same topic in several primary and secondary sources; and read, comprehend and respond to history and social studies texts in the grades 9-10 text complexity band independently and proficiently.

The sources. This lesson completes the invented record of Harmon Falls, a fictional Ohio town in the real flood of March 1913. You already know the diary of Clara Whitlock (source A), Walter Pruitt's 1963 interview (B) and R. M. Ashby's essays (C and F). Three new invented sources are added. All figures belong to the fiction.

Original fictional source G — Headline and first sentence, Harmon Falls Courier, 27 March 1913. "WHOLE TOWN UNDER WATER. Harmon Falls lies drowned this morning beneath the worst flood in its history, and the loss of life is feared to be very great."

Original fictional source H — Relief Committee register, summary table compiled 15 April 1913, with rents from the village's 1912 rent survey.

Columns: dwellings; dwellings flooded; families registered for relief; median monthly rent, 1912.

- Lower Ward: 240 dwellings; 160 flooded; 212 families registered; median rent $9.
- Mill Ward: 180 dwellings; 55 flooded; 97 families registered; median rent $12.
- Hill Ward: 150 dwellings; 4 flooded; 18 families registered; median rent $22.
- Total: 570 dwellings; 219 flooded; 327 families registered.

A note at the foot of the register, in Clara's hand: "Families are registered who lost wages while the Tamber Mill stood idle, whether or not their house took water. Some Lower Ward houses hold two families."

Original fictional source I — Pamphlet of the Citizens' Levee Committee, March 1914. "The levee will make Harmon Falls safe forever. The engineer's plan raises the levee to eighteen feet above low water; the crest of 1913 reached sixteen and one-half feet above low water at the Front Street gauge. With a foot and a half to spare, every family in the Lower Ward will sleep safe, and the terror of 1913 can never return."

Integrating quantitative and qualitative analysis. Qualitative analysis works with words: what witnesses report, how authors describe, what they emphasize. Quantitative analysis works with counts, measurements and rates. Integrating them means using each to test and explain the other, not placing a table beside a paragraph. Three moves make the integration.

Choose counts or rates to fit the question. Counts answer questions about total impact: how many families need relief, how many houses must be cleaned. Rates answer questions about how hard each ward was hit relative to its size. The wards have different numbers of dwellings, so for the question "which ward was hit hardest?" counts alone mislead and rates are needed; state the denominator each time. Lower Ward: 160 ÷ 240 = 0.667, or 66.7 percent of dwellings flooded. Mill Ward: 55 ÷ 180 = 0.306, or 30.6 percent. Hill Ward: 4 ÷ 150 = 0.027, or 2.7 percent. Whole village: 219 ÷ 570 = 0.384, or 38.4 percent.

Test each qualitative claim against the rates. Read as a claim that the homes of the whole town flooded, the Courier's "WHOLE TOWN UNDER WATER" greatly overstates: fewer than two dwellings in five flooded, and in the Hill Ward fewer than three in a hundred. The register counts flooded dwellings, not flooded streets or land, so it tests the headline on that measure only; how far the water spread over the ground, and the flood's whole impact (Hill Ward families were registered for relief although few of their houses took water), need other evidence. Clara's "the Lower Ward was a lake" is supported as a description of what she saw from Cemetery Hill, since two thirds of its dwellings flooded, but it is not a count, and one third of the ward's dwellings are not recorded as flooded.

Let the words explain the numbers. The Hill Ward registered 18 families for relief but had only 4 flooded dwellings. Read alone, that looks like an error. Clara's note explains it: families were registered for lost wages while the mill stood idle, whether or not their houses flooded. Similarly, the Lower Ward registered 212 families from 240 dwellings; the note that "some Lower Ward houses hold two families" helps explain, together with the lost-wage rule, how registered families can outnumber flooded dwellings (212 against 160). Without the qualitative note, the quantitative table would be misread.

Assessing reasoning and evidence. To assess the extent to which reasoning and evidence support an author's claims, separate three things: the claim (what the author wants you to accept), the evidence (the facts offered) and the reasoning (why the facts should lead to the claim). Then judge extent: fully, partly, or not at all, and say which part fails.

Apply this to the pamphlet. Claim: the levee will make the town "safe forever." Evidence: a levee crest eighteen feet above low water and a 1913 crest of sixteen and one-half feet above low water at one gauge. Reasoning: a levee higher than the worst known flood will stop every future flood. The evidence supports a narrower claim: that a levee rising eighteen feet above low water, if built as planned and if it holds, would have held back a flood as high as 1913's at that gauge, with 18 − 16.5 = 1.5 feet to spare. It does not support "forever," because the reasoning assumes no future flood can exceed the largest one recorded, an assumption the town's own history refutes: 1913 was itself worse than anything before it. It also does not address the second cause from lesson one, the surge from the railroad fill, which a levee along Front Street does not by itself prevent. Verdict: the evidence partly supports the claim; "forever" and "never return" go beyond it.

Apply the same test to Ashby's claim that the flood's toll "fell overwhelmingly on the Lower Ward, the town's poorest district, a pattern that the Relief Committee's own register makes plain." The register gives 212 of 327 registered families, or 64.8 percent, from the Lower Ward, and its flooding rate of 66.7 percent is more than twice the Mill Ward's 30.6 percent. "Poorest" rests on the median rent of $9 against $12 and $22; median rent is a reasonable indicator of income, though not a direct measure, because it records what housing cost and not what families earned. The claim is well supported for flooding and relief; "poorest" is supported indirectly.

Comparing treatments across several sources. A treatment is how a source handles a topic: what it covers, from what position, in what form, for what purpose. Comparing several sources means naming similarities and differences and explaining them by date, origin and purpose. Take the topic "how widely the flood struck." The Courier headline, printed the day after the surge for an alarmed readership, treats it as total. Clara, on the same days but writing privately and from a hill, treats it as concentrated in the Lower Ward and records rumored numbers only as rumor. The register, compiled three weeks later for administering aid, treats it as countable and unevenly distributed. Ashby, seventy-five years later, uses the register to argue that the burden followed poverty. The pamphlet, written to win votes, treats the future rather than the past. Clara, the register and Ashby agree that the Lower Ward suffered most; the headline and the pamphlet make no comparison between wards, so they cannot be counted as agreeing. The sources differ on scale because their purposes differ.

Reading grades 9-10 history texts independently. Texts at this level combine long sentences with embedded qualifications, period vocabulary, and claims mixed with evidence. A proficient reader does four things without prompting: identifies date, origin and purpose before reading closely; paraphrases difficult sentences in plain words and checks the paraphrase against the original; marks each claim and the evidence offered for it; and turns every number into a comparison before trusting it. Proficiency means doing this on a new text, alone.

A misconception. Numbers are not automatically more objective than words. A table reflects choices about what to count and who counts it, and in this register families were counted for lost wages as well as flooding.

Worked integration: Question: did the flood strike the Mill Ward "lightly"? A student says yes because only 55 dwellings flooded, fewer than a third of the Lower Ward's 160. Convert first: 55 ÷ 180 = 30.6 percent, nearly one Mill Ward house in three. Then add the qualitative evidence: the Tamber Mill "stood idle for seven weeks" (source D), and Clara's note says families were registered for lost wages. The Mill Ward registered 97 families from 180 dwellings, far more than its 55 flooded houses. Integrated conclusion: the Mill Ward's houses flooded at under half the Lower Ward's rate, but the idle mill spread wage losses beyond the flooded houses, so "lightly" understates it.

Worked assessment of extent: Claim in the Courier: "the loss of life is feared to be very great." This is a claim about a fear, not a count. Evidence offered: none in the sentence. Clara, writing the day before (26 March), records "People say forty; people say none." Reasoning available in the article: none. Assessment: Clara's entry shows that rumors of deaths, and of none, were circulating, which is consistent with the newspaper's statement that great loss was feared but does not independently verify its wording; the sentence itself offers no evidence for the scale of loss, and a reader should not cite it as a death toll. Extent of support: the claim that loss of life was feared is consistent with Clara's record of rumor, though not confirmed by it; the implied claim of great loss is unsupported by this text.

Worked comparison across sources: Topic: the cause of the Lower Ward's sudden flooding. Clara (primary, written 25 and 26 March) reports men saying that water was "piling up" behind the fill, then the fill giving way. Walter (primary, 1963) separates the rising river from the release of held water. Ashby (secondary, 1988) adds the 1909 construction and the ignored 1910 complaint. The pamphlet (1914, persuasive) is silent on the fill and attributes safety to height alone. Similarity: the three sources that address cause agree on the fill's role. Difference: only the persuasive source ignores it, which fits its purpose of promoting one solution. Explanation of the difference by purpose is the analytic step.

Data-and-words record (representation): Recompute the flooding rate for each ward and for the village, showing each division. Then build a chart of your own (bar chart or table) of the rates, and beside each bar write one qualitative source statement that the rate supports, qualifies or contradicts, with its source letter. Add one sentence explaining why the Hill Ward registered more families than it had flooded houses.

Independent performance: Read the whole Harmon Falls set independently and write a response of 400 to 500 words to the question: How well do the Courier, the Levee Committee pamphlet and Ashby support their claims about the flood's reach and its remedy? Success criteria: (1) at least three calculated rates with the division shown; (2) each author's claim, evidence and reasoning stated separately; (3) a judgment of the extent of support for each (fully, partly, not at all) with the failing part named; (4) at least one comparison of how two sources treat the same topic, explained by date, origin or purpose; (5) at least one paraphrase of a difficult sentence checked against the original; (6) no invented source quoted as a fact about Ohio. Then, working alone, apply the same routine (date, origin and purpose first; paraphrase checked against the original; claims marked with their evidence; numbers turned into comparisons) to an unfamiliar grades 9-10 primary or secondary source that your teacher supplies from your current history unit, and write a 150- to 200-word response assessing how well its evidence supports its main claim.