This series of four worksheets was developed for use by students in years seven-10. They concentrate on estimation of length, with the assumption that students will have many other estimation experiences. (MNS)

Techniques that students can use to make predictions about performances in the Olympics include point estimation. This is used to estimate a single value using a set of data. A worksheet for students is included. (MNS)

Constructing solids, number of possible solids, properties of the series, general terms, and sum of the series are each described and illustrated. (MNS)

The rules for playing the medieval game of Rithmomachia, a battle of numbers, is described. Moves, rules of capture, play with the pyramids, components of pyramids, victories, and hints on strategy are each given. (MNS)

Using the calculator to do addition and multiplication in base 2 is discussed, with the stress on how to change numbers from one base to another using the calculator. (MNS)

The author argues that sine, secant, and tangent should be taught as the three basic trigonometric functions rather than sine, cosine, and tangent. (SD)

Activities are described for a probability unit in which the Markov process is studied and applied to the weather. (DT)

Several methods for finding rational numbers which lie between two given rational numbers are described. (DT)

A geometric area problem is analyzed and generalized. (DT)

Modular arithmetic is used in explaining why it is possible to read the Vernier caliper to the nearest tenth of a millimeter even though the caliper is marked only in millimeters. (DT)

The benefits of using computer simulations in teaching elementary probability topics are discussed. Sample probability problems suitable for simulation are suggested. (DT)

Graphical representations of modular arithmetic multiplication tables and of equations in modular systems are investigated. (DT)

A paper staircase drawn on a grid forms the basis for a discovery lesson in algebra. (DT)

Short units for general mathematics students are described; sample worksheets are included. (DT)

Test construction, administration, grading, and reviewing are discussed. (DT)