May cause a weak learner self help groups and after school are more than rising percent of average scores before schools and increased per cent greater than the participant group and medium?
May cause a mild, self-improvement group classes and the posttest mean score is the percentage increase over the previous average and the percentage increase over the course of good and mediocre.
May cause the students weak group, self-improvement and the exam score after learning rate per cent increase over the average students and the percent increase over the students กลุ่มเก่ง and moderate.