California Grade 8 Social Studies

How can a border change while people remain in the same place?

Open the National Archives Treaty of Guadalupe Hidalgo, with transcript and context. Signed in 1848, the treaty ended the war between the United States and Mexico. It changed territorial boundaries and addressed Mexican residents in the transferred territories. Read Articles V, VIII, and IX with a teacher, stopping to identify who makes a promise and whom it concerns.

Give each part of the document a different reading job

1. Article V: locate the boundary. Find the named rivers, the Pacific coast, and Upper and Lower California on a teacher-selected historical map. The map’s date matters: this is an 1848 boundary, before the 1853 Gadsden Purchase.
2. Article VIII: identify a choice and its timing. Separate staying or leaving from nationality. The article allowed Mexican residents who remained to choose Mexican or United States nationality within a year of the exchange of ratifications; it specified a United States choice if no choice was made.
3. Article IX: examine the promises. Identify protections concerning liberty, property, and religion, and notice that the provision about full citizenship rights depended on timing determined by Congress.

Make three notes for each article: its subject, the evidence supporting your explanation, and a question it leaves unanswered. You do not need to copy the whole passage. Name the article and explain its relevant provision in your own words. Check unfamiliar historical terms before using them in a claim.

Keep an agreement separate from evidence of its implementation

Consider this claim: “The treaty changed the political boundary and established provisions concerning residents’ nationality and rights. To explain how those provisions affected a particular family or community, I would need evidence beyond the treaty.” The first sentence describes the agreement; the second identifies a limit of this source.

An answer saying that everyone immediately received the same rights goes beyond what this reading establishes. Ask the student to identify the people and timing described in the relevant articles. A different error is to treat the treaty as a personal account. Identify its government authorship and purpose before deciding what kind of question it can answer.

Plan the next source search

Choose one question about a community, a land claim, or an individual’s experience. List what a useful second source would need to show: a place, a date, a person’s account, or a recorded decision. A letter might reveal a writer’s experience; a land-claim record might document a specific proceeding. Neither automatically represents every resident.

Ask whose voices are missing. Government negotiators do not speak for every Mexican resident or Indigenous nation. When extending the investigation, include sources from the people or communities being studied and explain the limits of each source. Revise the claim when additional evidence changes what can be supported.

Choose practice from the question you still need to answer

For the boundary and war context, read state references 8.5.2 on PDF page 42 and 8.8.6 on PDF page 44. For source analysis, open the existing lessons on Context, Corroboration, and Multiple Perspectives or Claims, Counterclaims, Evidence, and Citation.

After the lesson, use its related topic quiz to identify a concept that needs another explanation. Return to your document notes and improve one claim. A quiz result can guide the next study session; this activity and the general library do not establish complete coverage of California’s history course.