This zip file contains two articles on antibiotic resistance. Both articles loosely discuss natural selection while primarily focusing on bacterial resistance to antibiotics; one is a more challenging read than the other. In addition, the zip file contains critical thinking questions designed for each article. Both contain "Before you read", "While you read", and "After you read" sections. The "After you read" section is a common assessment for both articles and asks the students to evaluate graphic organizers. The "After you read" common assessment would be an excellent tool to facilitate small group discussion after reading the articles (jigsaw activity). In addition, you could split the class into two groups and debate the final "After you read" section.
When I used this activity in a regular education biology classroom, I gave my accelerated and stronger students the more challenging article/questions. I've used the easier article/questions with biology students at an alternative high school. In my opinion, the easier article/questions would also be appropriate for middle school science students.
Full answer keys to both activities are included.