Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

## How Long is a Minute?

Try to judge when you think a minute has passed without counting in your head or watching a clock. Use the online stopwatch to record your guesses, get some friends to guess as well and try to come up with reasons for the variations in responses.

## How Many Valentines?

How many valentines are exchanged if each of five friends gives a valentine to each of their other friends? Reflect on your solution, compare it with some others listed, and think about how you would solve a similar problem for more people.

## Hypercube

Discover a fourth spatial dimension by using analogies (point, line and plane) from lower dimensions. Model objects of lower dimensions to gain understanding of a hypercube, which exists in the fourth dimension.

## I Took a Trip on a Train

You took four snapshots of some geometric shapes that you saw on your train trip around a circular track. You dropped the pictures and got them mixed up, and now you must imagine your trip to put them back in order.

## Inscribed Angles

Study inscribed angles in semicircles and quarter-circles. What conjectures can you make about the measure of an inscribed angle in semi- or quarter-circles? View non-Flash version.

## Interest Rate Calculator

The bank is offering four special savings plans for new customers. Use the interest rate calculator to determine the best offer, taking variables like principal and compounding into account.

## Interpreting Stories and Graphs

Read a story and draw a graph that tells the same story. Next look at a graph and write a story to match.

## Journal

Answer the journal prompts, including reflections from the workshops and your own classroom. The journal (requires a login) will save your entries for 120 days after you register. However, you can print or transfer your entries to your own computer.

## Konversion Kingdom Mania (British and Metric Conversions)

Visit an amusement park and try to solve six conversion problems as fast as you can.

## The Largest Container

Observe as a sheet of letter-sized paper is cut and assembled to form a rectangular prism, a triangular prism and a cylinder. Which object would contain the greatest volume?

## Learning Temperature Units and Their Symbols

Did you know that there are other temperature scales besides Fahrenheit and Celsius? Read the descriptions of all the scales and then match the scale to the correct thermometer.

## Length Symbols

Study the names and abbreviations of length units in both the metric and British systems. Then play a game to see how well you remember them.

## Limerick Factory

A limerick is a very funny piece of nonsense verse with its own special pattern of rhyme and rhythm. Use this tool to choose phrases to create your own limerick that follows the pattern.

## Line Plot Representations

Create line plots that have a mean of 5 but different deviations from the mean. Notice that the total deviation above the mean must equal the total deviation below the mean.

## Location Graphs

Consider two graphs representing the number of people present at two different locations over the course of the day. Interpret the graphs to guess the locations.

## Making a Line Plot

Practice creating a line plot. Use raisin counts for 17 boxes of raisins to graph the distribution of raisins per box.

## Making a Stem and Leaf Plot

A line plot may not be a useful graph for investigating variation so we must come up with a new representation based on groups of data. Construct a stem and leaf plot from a set of 26 data values.

## Making a Tree Diagram

A tree diagram is a helpful tool for determining theoretical or mathematical probabilities. Toss a coin and watch as branches represent a toss of either head or tails.

## Making Sense of Mathematics Text

In this activity, explore different protocols for making sense of mathematical text that meet the needs of your students.

## Mass Units and Their Symbols

Study the names and abbreviations of mass units in both the metric and British systems. Then play a game to see how well you remember them.