Claim Evidence Reasoning CER Companion Worksheet | Experimental Design | 7-12

Printable companion for an online lesson
These printable worksheets and visual notes accompany an online lesson hosted on an external, ad-free educational website. The online lesson is free to use, with no fees, login, or registration required. Internet access is required to use the online lesson alongside these pages. The direct lesson link is included in the downloadable teacher guide.

Printable companion pages for the free Case Closed: The Bean Seed Test lesson. Use the online lesson first or alongside these pages—the claim, evidence, and reasoning work is designed to match.

Students investigate whether soaking bean seeds affects sprouting, then practice separating a claim from the evidence that supports it and the reasoning that connects them. They compare results, identify stronger evidence, and write a clear evidence-based explanation using the CER framework.

What is included

• Visual Notes: 2 illustrated student pages with a matching answer key
• Standard Worksheet: 2 student pages with a matching answer key
• Companion Teacher Guide with pacing tips and discussion prompts
• Terms of use

Classroom use

The free online lesson is self-paced. Use it with these companion pages for stations, substitute days with internet access, flipped classrooms, or scientific-reasoning review. Assign either student format alongside the online lesson and use the other for review, differentiation, or makeup work. Every student page has a matching answer key.

Grades 7–12. Best fit for middle school science, introductory biology, and claim-evidence-reasoning units. Single-teacher license. © Osmia LLC.