Final answer:
Portfolio assessment is the assessment procedure that provides the best screening data.
Step-by-step explanation:
The assessment procedure that is designed to provide the best screening data is portfolio assessment. Portfolio assessment involves collecting and reviewing a student's work over time, including samples of their best work in a particular subject or skill area. This method allows for a holistic view of a student's abilities and progress, capturing their growth and individual strengths.
Unlike high-stakes standardized tests, which can be limited in their scope and often only measure a student's performance on a single day, portfolio assessment allows students to demonstrate their understanding and skills through a range of assignments and projects. Teacher observation and long-term projects can also provide valuable information, but they may not offer as comprehensive of a picture as a portfolio assessment.