You should take particular care if you have fair or freckled skin that doesn’t tan, or goes red or burns before it tans; red or fair hair and light coloured eyes and a large number of moles.
Dylai plant, pobl ifanc, rhieni neu ofalwyr siarad â'r ysgol i ddechrau os oes ganddynt unrhyw gwestiynau am allu'r dysgwyr gyda mathemateg neu weithio gyda rhifau.