Several Universities have released free videos on Chemistry Practicals for GCE Advanced Level students. This would be very useful for A Level teachers and students.
Chemistry A/L Practical videos in Sinhala University of Sri Jayewardenpura
A/L Chemistry Pracical videos by University of Kelaniya
In this YouTube Channel You can watch all the videos in Chemistry syllabus categorized into separate Units.
https://www.youtube.com/channel/UCpAEt8AGDKzJMttkuIYFyKA
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Useful