Integrate a chart and a map with a history text, and read history texts in the grades 6-8 band independently

Learning goal: Integrate visual information in charts, graphs, photographs, videos or maps with other information in print and digital texts, and read, comprehend and respond to history/social studies texts in the grades 6-8 text complexity band independently and proficiently.

An invented record with a chart and a map. The text, the figures and the map were written and drawn for this lesson. Sedley and its lock are not real, the county has no real shape, and the tonnage figures are hypothetical; they were chosen to be consistent with one another so that you can practice integrating them, not to describe any real canal. The diagram below carries both visuals: a schematic map of the county on the left and the bar chart of the tonnage on the right.

Original informational text — Freight at the Sedley Lock, 1848 to 1858 (invented for this lesson; all figures hypothetical).

The toll collector at the Sedley lock recorded the weight of freight passing through the lock each season, and his ledgers, in this imagined county, survive for the eleven years from 1848 to 1858. The chart that accompanies this text plots the total for every second year. In 1848 the lock passed about 42,000 tons. The figure rose to 45,000 tons in 1850, the highest in the ledgers, then fell to 40,000 in 1852, 31,000 in 1854, 22,000 in 1856 and 15,000 in 1858. From the 1850 peak to 1858, freight through the lock fell by two thirds.

The ledgers also record what the freight was. In 1848 flour and wheat made up more than half the tonnage, with the rest divided among pork, salt, coal, stone and merchandise moving inland from Cleveland. By 1858 flour and wheat had almost disappeared from the ledger; the tonnage that remained was mostly stone and coal, heavy goods for which speed mattered little and price mattered most.

The map that accompanies this text is a schematic drawn for this lesson, with a scale bar and north at the top; it shows the county in 1858. The canal runs north to south through the middle of the county, with Sedley and its lock near the center. A railroad line, opened in 1852, crosses the county from east to west about eight miles north of the town, with a station at the county seat. A second line, opened in 1855, runs along the eastern edge of the county. Neither line touches Sedley. Both lines have stations within a day's wagon journey of most of the farms in the county's northern and eastern townships, which were its main wheat-growing districts.

The collector's ledgers do not say why the freight fell. They record what passed the lock, not what went elsewhere. The map and the change in the kind of freight suggest an explanation: grain from the northern and eastern townships, which had once come south by wagon to the canal, could after 1852 go north, and after 1855 east, by wagon to a station instead, and did. The heavy, low-value goods for which the canal was still cheapest kept coming. The explanation is consistent with the ledgers and the map, but neither the chart nor the map proves it. A reader who wanted to test it would need records that follow the same grain: farmers' account books showing where each farm sold its wheat before and after 1852, or station records naming the farms or townships that shipped. Station totals alone would show only that rail freight rose, not that it was the grain that had once passed the lock.

A photograph of the lock taken in 1858, if one existed, might show the lock house, the gates and perhaps an idle boat, but it could not show tonnage, and it would show one day, chosen by the photographer, rather than a season.

Why visual information has to be integrated, not just noticed. History texts come with charts, graphs, tables, maps and photographs and, in digital texts, videos and interactive maps. Each kind shows something the print cannot, and each leaves out something the print supplies. A chart or graph shows quantity and change at a glance: the bars in this lesson make the two-thirds fall visible in a way that a sentence of numbers does not. It does not show cause, and it does not show the years that are not plotted. A map shows position and distance: which townships lie nearer to a station than to the lock, and, with its scale bar, roughly how far a wagon would have to go; it does not show how long the trip would take. It does not show how much moved, or when, and a schematic map like this one shows relative positions rather than the real shape of roads and rivers. A photograph shows what one place looked like at one moment chosen by the photographer, from one position; it cannot show a trend, and it can be posed. A video is a sequence of such moments with a soundtrack chosen by an editor. To integrate visual information with print is to put the two together so that each corrects and completes the other: the chart supplies the quantities the text summarizes; the text supplies the dates and the kinds of freight the chart cannot show; the map supplies the geography that makes the text's explanation plausible.

A routine for integrating. First, read the visual on its own terms before reading it against the text: the title, the axis labels, the units, the scale, the key, the date and the source. A bar chart whose axis does not start at zero can make a change look larger than it is; a map with no scale hides distance. Second, state in one sentence what the visual shows, with numbers: freight at the lock fell from 45,000 tons in 1850 to 15,000 in 1858. Third, find the sentences in the print text that the visual supports, extends or contradicts, and check that the units and dates match. The text says the fall from the peak was two thirds; 45,000 minus 15,000 is 30,000, and 30,000 divided by 45,000 is two thirds, so the chart and the text agree, and you have checked rather than assumed. Fourth, ask what question the combination raises that neither answers alone, and what further source would answer it. The chart shows a fall; the map shows the railroad; the text proposes that the grain went to the stations; records that follow the same farms' grain before and after 1852 would test it. Digital texts add one more step: note who made the visual and when, because a linked chart or an embedded video may come from a different source and date than the page around it.

What integration is not. Students often use the visual as decoration, glancing at it and then quoting only the print. They also do the reverse and treat the visual as proof of whatever the text claims. A chart that shows freight falling after a railroad opened is consistent with the explanation that the railroad took the freight; it is not proof, because the same bars would appear if the wheat harvest had failed or the mill had closed. Integration means saying exactly what each source contributes and where the reasoning between them is inference rather than evidence.

Reading history texts in the grades 6-8 band independently and proficiently. The texts in this lesson are written at the level of complexity expected of a reader by the end of grade 8: sentences with several clauses, domain vocabulary (ledger, tonnage, township, county seat, merchandise), assumed background (that canals froze, that wheat was the cash crop), quantities that must be held in mind across paragraphs, and an argument that is qualified rather than asserted. To read such a text independently and proficiently means you can comprehend it and respond to it without a teacher pre-teaching every term, and it is a skill you build by carrying your own scaffold. Preview: read the title, the first and last sentence of each paragraph and the visual before reading the whole text, and write one sentence predicting what it argues. Chunk: read one paragraph at a time and write a five-word note on what it does (records the fall; describes the freight; describes the map; proposes an explanation; sets a limit). Gloss: mark every domain word and write its meaning as used, from the context first and a reference second. Reread: any sentence with a number or a qualification ("consistent with" but "does not prove") gets read twice. Summarize: after the last paragraph, write the central idea in your own words and check it against your prediction. Respond: write a claim about the text, support it with a citation from the print and one from the visual, and state one limit. The scaffold is yours to remove: as the routine becomes habit, drop the written notes and keep the questions.

A fully worked model. Respond to the text with an integrated claim. Claim: the ledgers and the map together support, but do not prove, that the railroad drew the county's grain away from the lock. Print evidence: "By 1858 flour and wheat had almost disappeared from the ledger." Visual evidence: the chart shows tonnage falling from 40,000 in 1852, the year the first line opened, to 15,000 in 1858, while the map places both stations nearer the wheat-growing townships than the lock, and the text adds that they were within a day's wagon journey. Reasoning: the kind of freight that vanished is the kind the text says could reach a station by wagon, and the timing matches the openings. Limit: the ledger records only what passed the lock, so the grain's destination is inferred; records that follow the same farms' grain would be needed to establish it.

A misconception. Independently does not mean without strategies. It means the strategies are yours. A reader who previews, chunks, glosses and rereads without being told to is reading independently; a reader who skips those steps and guesses is not reading proficiently, however fast the page turns.

Worked chart reading: Read the chart in isolation. Six bars, one for every second year from 1848 to 1858; unit, tons per season; highest bar 45,000 in 1850; lowest 15,000 in 1858; each plotted year after 1850 is lower than the one before. One sentence: freight passing the lock rose slightly to 1850 and then fell by two thirds by 1858. Now check the print. The text measures the two-thirds fall from the 1850 peak: 30,000 out of 45,000. Measured from 1848 instead, the fall is 27,000 out of 42,000, about 64 percent, which is close to but not exactly two thirds. Recording which starting point the text uses is part of integrating; a reader who quoted two thirds from 1848 would be slightly misreporting the chart.

Worked map integration: Read the map on its own terms first: north is up, the scale bar is 10 miles, the canal runs through the middle, the 1852 line crosses about 8 miles north of Sedley with a station at the county seat, the 1855 line runs down the eastern edge with a station, and the wheat townships are labeled north and east. Against the scale bar, the county-seat station is closer to the northern townships than the lock is. The map gives distance, not travel time: "within a day's wagon journey" comes from the text, which the map does not contradict. Now put that beside the chart, which falls from 40,000 in 1852 to 22,000 in 1856. The geography makes the text's explanation plausible, because the districts that grew the wheat are the districts nearest the stations, and the two openings, in 1852 and 1855, come at the start of and during the steepest fall, 9,000 tons in each of the two-year spans from 1852 to 1856. What the map cannot show is any actual shipment, so the integrated statement is: the map and chart are consistent with the explanation and neither proves it.

Worked independent reading routine: Apply the routine to the fourth paragraph of the text. Preview: its first sentence, "The collector's ledgers do not say why the freight fell," signals that the paragraph will set a limit. Chunk note: proposes an explanation, then limits it. Gloss: township, from the phrase "northern and eastern townships" of the county, a subdivision of a county; a reference confirms that Ohio counties are divided into townships. Reread: the sentence "consistent with the ledgers and the map, but neither the chart nor the map proves it" is a qualification and gets a second reading. Summarize: the writer offers the railroad as the likely cause and names the evidence that would be needed to test it. Respond: the writer's explanation is a reasoned judgment, supported by the print and the visuals and openly not proved by them.

Integration record (representation): Make a table with three columns: what the chart shows, with numbers; what the print text says; what the map adds, with a distance read against its scale bar. Fill one row for each of the four plotted years from 1852 to 1858 and a final row labeled cause. In the cause row write "inferred, not shown" in the chart column, "proposed and limited" in the text column, and name the missing source that would settle it in the map column.

Integrated response on the Sedley text: Write a response of about 200 words that states a claim, supports it with one citation from the print, one from the chart and one from the map, and states one limit. Every number quoted must match the chart and its caption; the claim is labeled as supported rather than proved, with the reason; and the response says what a photograph or a video of the lock could and could not add.

Independent performance on an unseen text. The Sedley text has been worked through in this lesson, so reading it again is not a test of independent reading. Read the following second text, which you have not seen, on your own and without help, using the routine and keeping your preview sentence, chunk notes, glossary and reread marks as evidence of the process.

Second invented text — The Grain Market at Wexford Station, 1859 (written for this lesson; the town, the merchant and every figure are hypothetical). Wexford, the county seat, had no grain market before the railroad. Farmers in the northern townships sold to buyers who came to the canal landings, or hauled their wheat south to Sedley and took whatever the boat captains offered on the day. When the station opened in 1852, a merchant named Elias Brandt built a warehouse beside the track and began buying wheat for cash at a posted price, changed each morning according to the telegraph report from Cleveland. His ledgers, in this imagined county, show 9,000 bushels bought in the 1853 season, 24,000 in 1855 and 41,000 in 1858. Farmers who had once waited a week for a boat could now sell on the day they arrived. Brandt's price was usually a few cents a bushel below what the same wheat fetched at the lake, but it was paid at once, and a farmer with a note falling due at the bank did not argue. The warehouse also sold what the railroad brought in: stoves, window glass, printed cloth and coffee, unloaded on the same platform where the wheat went out. By 1859 the county newspaper described the station as the place where the county's harvest went to market. It could not say how much of that harvest had once gone by the lock at Sedley, because Brandt's ledgers recorded what he bought, not where it would otherwise have gone.

Then write a response of about 250 words that (a) states the Wexford text's central idea in one sentence; (b) explains what Brandt's ledger figures can and cannot show about the fall in freight at the Sedley lock, citing one sentence from the Wexford text and one number from the chart; (c) says what the map adds to the comparison; and (d) states one limit, and defines at least five domain terms from the two texts as they are used. Success criteria, which a reader checks against the texts and not against the notes: the central idea names the station as a new market that paid cash at once, not merely that the railroad came; the response notices that the ledger figures rise while the lock figures fall and says that neither record shows the same wheat moving from one route to the other; every number matches its source; the claim is labeled as supported rather than proved; and both texts, the figures and the map are described as invented for this lesson.