Origin Purpose Value Limitations
Do not focus on the content of the source. You are evaluating the reliability and usefulness of the source itself (the book, the website, the photograph, the news article, etc.).
Remember, EVERY source has value and EVERY source has limitations. Also remember, a primary source can be reliable and a secondary source can be reliable but they can also be unreliable…this is why you are evaluating the source-to determine its reliability AND its usefulness as a source for you to use.
And when your teacher asks you to evaluate the OPVL of a source, you should use full sentences and respond in one or two paragraphs.
Here’s a presentation I used with the grade 9 Geo students a few years ago.