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The following books are now out of print, but available second-hand online:
Don’t Shoot the Goalkeeper, Oxford University Press, 1976.
The Parents’ Day School Book, Panther, 1978.
Dig for History: Active Learning across the Curriculum, Southgate, 1992.

All titles listed are available from bookshops, or from publishers’ or booksellers’ websites. If possible please avoid ordering through tax-dodging Amazon.