There are several types of evaluation:
1. Diagnostic evaluation assesses students' prior knowledge before instruction.
2. Formative evaluation provides feedback to students and teachers during instruction.
3. Summative evaluation determines student achievement for grading purposes.
There are also two approaches to evaluation: norm-referenced compares students' performance to others, while criterion-referenced compares performance to a predetermined standard. Basic guidelines for educational assessment include using evaluation as ongoing feedback to check programs and modify strategies.