1. the ability to write the spelling language Thailand students Grade 4-6 school district, phayao, Mae Ka level through criteria is ≥ 50 per cent accounted for 60 percent, according to the variable cost breakdown encounter that the female has the ability to write a spell level through criteria is ≥ 50 per cent more than male 66.67 per cent of students who passed the criteria level is ≥ 50 per cent are in the age range of 10 years maximum number 40.74 percent of students qualify level is ≥ 50 per cent with an average grade in many levels of 2.51-3.50 there are 15 per cent men, 55.56.