In both maintained nursery schools and nursery classes attached to primary schools, the ratio for three- to five-year-old children should be 2:26, or 1:24 where the headteacher also teaches.

BBC: Nursery

Net Enrollment Ratio in primary education had increased from 58% in 1999 to 76% by 2010 and the Gender parity index from 0.85 to 0.93 over the same period of time.

UNESCO: EDUCATION

Mr da Silva, likewise, could keep reiterating a recent pledge to maintain a sufficient primary surplus to stabilise the government-debt ratio.

ECONOMIST: Brazil

Similarly, UNESCO noted that the net enrolment ratio (NER) in pre-primary education in 2005 for children aged 3 to 5 years was 46 per cent which suggest that well over half the pre-school aged population has no access to ECE.

UNESCO: The Mother-Child Home Education Programme (MOCEP)

The use of cellulose and cardanol, both plant resources, as the plastic's primary components produces a plastic that features a high plant component ratio of more than 70%.

ENGADGET: NEC builds a better bioplastic from plant stems and cashew nut shells

More youngsters than ever before have internet access and the ratio of pupils to computers is coming down in both primary and secondary schools.

BBC: High-tech future for Scottish schools