Final answer:
A one-group pre-test/post-test design is an experimental design where the same group of participants is tested twice - once before a treatment or intervention (pre-test) and once after the treatment or intervention (post-test). This design is commonly used to assess change or improvement in participants' scores.
Step-by-step explanation:
A one-group pre-test/post-test design is an experimental design where the same group of participants is tested twice - once before a treatment or intervention (pre-test) and once after the treatment or intervention (post-test). The purpose of this design is to assess the change or improvement in the participants' scores from the pre-test to the post-test. In the context of your question, if you are comparing the effectiveness of a new math textbook, you would administer a math test to the group of students before using the textbook (pre-test) and then administer the same test after a year of using the textbook (post-test). By comparing the pre-test and post-test scores, you can determine if there has been any improvement in the students' math skills.