Design technology Childre's Engineering by Susan Dunn and Rob Larson 1990

Design and Problem Solving in technology by John Hutchison and J. Karsnitz

Technology in your world by Michael Hacker and Robert Barden

https://www.youtube.com/watch?v=F00R3pOXzuk

https://www.youtube.com/watch?v=8wFOe6efHKY

https://www.youtube.com/watch?v=Xz2B1nNNUeY

https://www.youtube.com/watch?v=5yObnwkvh1o