Dr K Ariyasinghe, most experienced O/L Science teacher in Sri Lanka has started several video lesson. You can follow these lessons and study at home.
Grade 11 Sinhala - YouTube video playlist
Science O/L New syllabus Practice Papers and Answers - Sinhala Medium
Science O/L New Syllabus Practice Papers and Answers - English Medium
Download O/L & Grade 6-10 Free Lessons, videos – Study at Home
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