21.   If recycled materials were used, far less energy would be needed which means less pollution.

22.   The department also offers a one-year Scandinavian Cultural History course which uses translated materials and therefore requires no knowledge of a Scandinavian language.

23.   I analysed them and found that a material had been used which is only obtainable in Iron Curtain countries.

24.   Three-dimensional work can be particularly effective and young children can achieve some remarkable things using simple materials like cardboard, paint and plasticine.

25.   Where paper based source materials are being used, the teacher must give thought to ease of access for retrieval as well as the effectiveness of storage.

26.   Staff in record offices will appreciate occasional feedback about how their material has been used.

27.   Database programmes make it easier to use bulk material like a census in the classroom, which previously presented considerable handling and organisational problems for the teacher.

28.   This has the great advantage of allowing local history materials to be used.

29.   B has to achieve the same end result by using materials available in the early nineteenth century, e.g.

30.   The technology, centring on silicon, uses materials that trap sunlight, which is converted into electricity.