Here are two resources submitted concerning Inquiry:

1. How to make lab activities more open ended

By Alan Colburn this article was published by the CSTA Journal in the Fall of 1997, pp. 4-6. The link below will access the article online:
How to make lab activities more open ended

2. Inquiry: Learning from the Past with an Eye on the Future

By Ronald J. Bonnstetter this article was published by the Electronic Journal of Science Education (EJSE): v3 n1, in September of 1999. The link below will access the article online:
Inquiry: Learning from the Past with an Eye on the Future