PERBEDAAN PENINGKATAN PENGETAHUAN ANTARA METODE CERAMAH DAN PEMUTARAN VIDEO KARTUN DALAM PENYULUHAN KESEHATAN GIGI PADA SISWA KELAS II SD BODHICITTA MEDAN: DIFFERENCIATION OF KNOWLEDGE INCREMENT BETWEEN LECTURING METHOD AND CARTOON VIDEO SHOWING IN DENTAL HEALTH EDUCATION OF SECOND GRADE STUDENT AT BODHICITTA SCHOOL MEDAN - Gema Nazri Yanti (TALENTA, 2012)