Final answer:
Formative assessments are a type of assessment that provides detailed information about student mastery, informs instruction, and is given to students at risk.
Step-by-step explanation:
Assessments that are given only to students at risk, longer than screening tests, and provide detailed information about student mastery while informing instruction and treatment are called formative assessments.
These types of assessments are typically used in education to monitor student progress and provide feedback for instructional planning.
Formative assessments are designed to help teachers identify students' strengths and weaknesses, assess their understanding of concepts, and make instructional decisions based on the results. They provide valuable information that can guide teachers in adjusting their teaching methods and strategies to meet the individual needs of students.