Formative assessment includes a series of formal and informal evaluation conducted by teachers while the learning process is on, to serve as a continuous feedback so that teaching and learning activities may be modified for attainment of intended instructional outcomes. Diagnostic testing aims at detecting learning deficiencies in students and is followed by remedial teaching. Placement evaluation is used to place students according to prior achievement or personal characteristics, at the most appropriate point in an instructional sequence, in a unique instructional strategy, or with a suitable teacher. Summative evaluation certifies,grades,or attests the student's successful completion of a complete level of instruction.