To search Google by reading level, Google has published the following steps:
- Click More search tools on the left side of the search results page.
- Click Reading level. You’ll now see results annotated with reading levels as well as a percentage breakdown of results by reading level.
- To filter your results by a specific reading level, select your desired level (Basic, Intermediate, orAdvanced).
- At any time, you can click the X in the right corner of the blue bar beneath the search box to go back to seeing all results.
I tried searching on "titanic" and it was interesting to note the changes to the search results when clicking on the various reading levels. Try it out!