Author

Helen Challand

16 books found

Cover of Experiment With Electricity

Experiment With Electricity

Helen Challand · First published 2003

Cover of Disappearing wetlands

Disappearing wetlands

Helen J. Challand · First published 1992

Cover of Vanishing forests

Vanishing forests

Helen J. Challand · First published 1991

Cover of Experiments W/Chemistry

Experiments W/Chemistry

Helen J. Challand · First published 1988

Cover of Experiments with chemistry

Experiments with chemistry

Helen J. Challand · First published 1988

Cover of Experiments with electricity

Experiments with electricity

Helen J. Challand · First published 1986

Cover of Experiments with magnets

Experiments with magnets

Helen J. Challand · First published 1986

Cover of Plants without seeds

Plants without seeds

Helen J. Challand · First published 1986

Cover of Activities in the physical sciences

Activities in the physical sciences

Helen J. Challand · First published 1984

Cover of Volcanoes

Volcanoes

Helen J. Challand · First published 1980 · Latest edition 1983

Cover of Activities in the earth sciences

Activities in the earth sciences

Helen J. Challand · First published 1982

Cover of Activities in the life sciences

Activities in the life sciences

Helen J. Challand · First published 1982

Cover of Earthquakes

Earthquakes

Helen J. Challand · First published 1982

Placeholder cover for Pourquoi, comment?

Pourquoi, comment?

Helen Challand · First published 1965

Cover of 375 things to do

375 things to do

Helen Jean Challand · First published 1964

Cover of Science activities from A to Z

Science activities from A to Z

Helen J. Challand · First published 1963