Yayasan PETRONAS Equips 136 Stem Teachers for Hybrid Teaching Program Duta Guru inductee from Labuan, Angela Joseph engaging with her students online during a science lesson, in front of a green screen provided by Yayasan PETRONAS. Program Duta Guru inductee from Labuan, Angela Joseph demonstrating a water-candle experiment to explain the percentage of oxygen in the air during an online science class. Images projected on the green screen help her students to better understand the lesson.