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.
O/L Science Sinhala and English Medium
Grade 10 Science - Sinhala and English Medium
Grade 11 Sinhala - YouTube video playlist
More Learning resources by Dr K Ariyasinge
Science books by Dr K Ariyasinghe
Download O/L & Grade 6-10 Free Lessons, videos – Study at Home