Equivalence Chart

  • AGEAMERICAN SYSTEMTHAI SYSTEMBRITISH SYSTEMCATEGORY
    9 YearsGrade 4Prathom 4Year 5
    Category 1
    10 YearsGrade 5Prathom 5Year 6
    11 YearsGrade 6Prathom 6Year 7
    Category 2
    12 YearsGrade 7Matthayom 1Year 8
    13 YearsGrade 8Matthayom 2Year 9
    Category 3
    14 YearsGrade 9Matthayom 3Year 10