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National debating competition for secondary students in Indonesian-language and English-language debate on current global issues, tiered from region to an online national round.
LDI invites secondary students to debate global issues with critical, analytical and logical thinking. Two branches ran in 2026: Debat Bahasa Indonesia and Debat Bahasa Inggris. In 2026, 17,115 students registered, up 34 percent from 12,780 in 2025, and the 15 best English-debate speakers entered follow-on training with International Global Network toward AYIMUN in Kuala Lumpur in January 2027.