SlidesBiological systems Seven packs each containing 12 colour slides and teachers' notes. Compiled by T. Forder. Price £4.10 per pack. Available from The Slide Centre Ltd, 143 Chatham Road. London SW11SBR; Clare A. Duggan, Phil Lea Judith M. Troke David Veale Tape/SlidePhotosynthesis: Energy from light A tape-slide presentation in two parts with teachers' guide. Compiled by Gray Williams Jr. Each part has 80 plastic-mounted slides and a tape cassette for 25 minutes with audible signal on one side, 1000 Hz automatic signal on the other. Price £59.00. Available in the UK from Edward Patterson Associates Ltd, 68 Copers Cope Road, Beckenham, Kent BR3 1RJ. Available in the USA with slides prepacked in two carousel magazines with an LP record in addition to the cassettes. Price $139.50. Ref. 1039–1750. From Science and Mankind Inc., White Plains, N. Y. 10603, USA; Reshid Auladin Rosy Dixon Julie Stamford Tape/SlideThe work of the World Wildlife Fund Set of 60 plastic-mounted 35 mm colour slides and a prerecorded cassette tape, with notes. Prices: slides £8.30; tape £3.00 (double-frame film-strip available at £4.15). Ref. AVP 054/60. Available from WWF/IUCN International Education Project, Greenfield House, Guiting Power, Glos GL54 5TZ. (Many of the WWF tapes can be made available in foreign language versions. Write for further information to the address above.); John A. Barker VideotapesThe blood business A videotape in colour. Running time 30 minutes. Video hire £8.20. Video sale £140. Available from Concord Films Council Ltd, 201 Felixstowe Road. Ipswich, Suffolk IP3 9BJ; P. Saunders VideotapesGenetic chance. A videotape in colour. Running time 60 minutes. Originally produced by BBC TV in 1979. Video hire £13.50. Video sale £150. Available from Concord Films Council Ltd, 201 Felixstowe Road, Ipswich, Suffolk IP3 9BJ; P. Saunders ChartsCommon British Mammals A set of six posters, one on each of Rabbit, Grey Squirrel, Hedgehog, Deer, Badger, Fox. By D. Walton and D. Barbour. Obtainable from World Wildlife Fund, Education Department, Panda House, 11–13 Ockford Road, Godalming, Surrey GU7 1QU. Distributed to schools with the aid of Lloyds Bank; K. E. J. Wiseman ChartsThe development and care of teeth T50 A colour chart with teaching notes, size approximately 100 cm by 76 cm. Price £2.85. Available from Pictorial Charts Educational Trust, 27 Kirchen Road, London W13 0UD; Julie Stamford; John A. Barker ChartsThe blood system T51 A chart, in colour, with teaching notes, size approximately 100 cm by 74 cm. Price £2.85. Available from Pictorial Charts Educational Trust, 27Kirchen Road, London Wli OUD; John A. Barker ChartsJoints T52 A chart, in colour, with teaching notes, size approximately 100 cm by 76 cm. Price £2.85. Available from Pictorial Charts Educational trust, 27Kirchen Road, London W13 OUD; John A. Barker Multi-mediaSmoking F702 Pack of materials, price £2.85. Available from Pictorial Charts Educational Trust, 27 Kirchen Road, London Wli OUD; John A. Barker