Aliran Kurikulum di SMK Tinggi Kluang terbahagi kepada 3 aliran majoriti, iaitu Menengah Rendah ( Tingkatan 1 - 3 ), Menengah Atas ( Tingkatan 4 & 5 ) dan Pra Universiti ( Semester 1 - 3 ). Pentaksiran bagi setiap aliran dilaksanakan berdasarkan ketetapan yang diberikan oleh Kementerian Pendidkan Malaysia, iaitu Pentaksiran Bilik Darjah ( PBD ), Pentaksiran Berasaskan Sekolah ( PBS ), pentaksiran dalaman & pentaksiran awam ( SPM & STPM ).

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Curriculum streams at SMK Tinggi Kluang are divided into 3 major streams, namely Lower Secondary (Forms 1 - 3), Upper Secondary (Forms 4 & 5) and Pre-University (Semester 1 - 3). Assessment for each stream is carried out based on the regulations given by the Malaysian Ministry of Education, namely Classroom Assessment (PBD), School Based Assessment (PBS), internal assessment & public assessment (SPM & STPM).