While perusing various websites in search of a more challenging lab for my students, I came across a number of ideas where replacing the string in an Atwood's machine with a simple ball chain like the kind found in lamp pulls created an interesting system to investigate. The replacement of the string produced a nice nonuniform acceleration, but…

The College Board's Advanced Placement (AP) biology program is explained and options within it are explored in this guide for teachers. Experienced AP biology teachers were surveyed for information concerning approaches that were effective in their programs. Descriptions and suggestions from the 14 respondents are reported in the area of: (1)…

Describes using a local college for the teaching of the recommended Advance Placement laboratories as a way to increase greatly needed course time and to increase the amount of equipment available. (PR)

Examines a solubility laboratory experiment using silver acetate and spectrophotometers for an Advanced Placement chemistry course. Covers experimental procedure, analysis of saturated solutions, and a discussion of chemistry involved. Includes an absorbance curve for silver ions and solution preparation suggestions. (ML)