BBC News Published media captionEducating pupils in nature "releases stress of masks and social distancing," say teachers The number of teachers being trained to educate children outdoors has gone "through the roof" because of Covid-19, Natural Resources Wales (NRW) has said. About 450 teachers have enrolled on its outdoor learning courses in the last two months - compared to 350 for the whole of last year. The courses recently re-started following Covid restrictions. They are delivered via Zoom and encourage teachers to use nature to help teach key subjects. The rise follows a warning by the Institute for Outdoor Learning that a lack of school trips during the pandemic has cost the outdoor education sector £500m and caused the loss of 6,000 jobs.