A Million Penny Project
Students use a spreadsheet to show when they will have collected their million pennies.
[spreadsheet]

en español:
El Proyecto de un Millón de Centavos

Balloon Booths
Scale the size of a hot air balloon so you can make it fit through a narrow passage and hit a nail to pop it.
[Java applet]

Puesto de Globos

Building a House
What are the largest number of cubes to make the house? What's the smallest number of cubes?
[Java applet]

    

Containers
Use two measuring cups of a particular size to figure out how to measure out other quantities.
[Java applet]

    

Counterfeit Coins
Find the fewest number of weighings that will identify which of the nine coins is counterfeit.
[Java applet]

Monedas Falsas

Galactic Exchange II
By using the vending machine to buy food, determine the relative values of the coins.
[Java applet]

Intercambio Galáctico II

Heads and Tails
How many times do you have to flip a coin to get at least one head and one tail?
[Java applet]

    

How Many Cubes?
Given the front view and side view of some cubes, students are asked what the largest number of cubes can be used to make the arrangement and what the smallest number of cubes would be.
[Java applet]

¿Cuántos Cubos?

Mauna Loa
Using the monthly measurement data for 1975 through 1988 from Mauna Loa, predict the CO_{2} level for your birthday in the current year.
[Fathom™ or spreadsheet]

Mauna Loa

Miranda and the Rookie
Use a spreadsheet to compare salaries of the star basketball player and the rookie.
[spreadsheet]

Miranda y el Principiante

Munching Bugs
Help Sam the Chameleon use a special rule to find the bugs he can eat.
[Java applet]

    

Patio Stones
How many stones did Kathy need to buy to pave an area in her yard?
[Java applet]

    

Runners
Tell how a runner's step size predicts the time it takes to run from the building to the tree.
[Java applet]

Corredor

Spinners
Choose which spinner is most likely to have produced the given experimental results.
[Java applet]

    

Squares in a Square
If you have a checkerboard that is 50x50 with small squares inside it, how many squares will there be all together?
[Java applet]

Cuadros en un Cuadro

Tangrams
Use an interactive applet to discover some of the relationships among the pieces in a set of Tangrams.
[Java applet]

    

Temperature Change
Use the given information to find the temperature.
[Java applet]

    

TIPoW: A Phoney Deal
Use your TINspire™ to compare two cell phone pricing plans to determine for how many minutes of calls per month each one is the better deal.
[TINspire™]

    

TIPoW: Caliyah's Cart
Use your TINspire™ to figure out the maximum number of items Caliyah can buy, keeping in mind certain restrictions on weight and cost.
[TINspire™]

    

TIPoW: Chirp! Chirp!
Use your TINspire™ to find the temperature when a cricket chirps a certain number of times a minute.
[TINspire™]

    

TIPoW: Mauna Loa
Use your TINspire™ and the monthly measurement data for 1958 through 2008 from Mauna Loa to predict the CO2 level for a given month.
[TINspire™]

    

TIPoW: Sam and Teri's Bank Accounts
Use your TINspire™ to consider this scenario and question: Sam and Teri have bank accounts. Sam always withdraws money; Teri always saves it. When will they have equal balances  or will they ever?
[TINspire™]

    

Traffic Jam
Find the fewest number of moves for the ten people to end up on the opposite side from where they started.
[Java applet]

Tráfico Apretado

Train Trouble
How fast is the train moving to allow Herman and Sheila to each escape the tunnel?
[Java applet]

    

Types of Triangles
Students use a GSP sketch or an interactive web page to drag and manipulate four triangles. They identify one of each type: scalene, isosceles, equilateral, and right.
[The Geometer's Sketchpad®]

Tipos de Triángulos
