Evaluating Historical Sources
Aligned to C3.D3.1 — C3 Framework for Social Studies State Standards.
What this lesson teaches
Historians judge evidence by asking who created a source, when, and why. A primary source comes from the time being studied, while a secondary source interprets it later; both can carry bias or a particular point of view that must be weighed for reliability.
Worked example
A soldier's 1916 letter from the trenches is a primary source, but if he downplays the danger to reassure his family, a historian must read it critically rather than take it at face value.
Practice questions
- Define the difference between a primary and a secondary source.
- Explain why knowing an author's purpose helps you judge a source's reliability.
- Analyze how comparing several sources can reveal bias in any single account.
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Evaluar Fuentes Históricas
Los historiadores evalúan la evidencia preguntando quién creó una fuente, cuándo y por qué. Una fuente primaria proviene de la época estudiada, mientras que una fuente secundaria la interpreta después; ambas pueden tener sesgos o un punto de vista particular que debe sopesarse para determinar su fiabilidad.
Ejemplo: La carta de un soldado desde las trincheras en 1916 es una fuente primaria, pero si minimiza el peligro para tranquilizar a su familia, el historiador debe leerla de forma crítica en lugar de tomarla al pie de la letra.
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