Oil Spill!

As of May 28th,2010  it is believed that the early estimate of 210,000 gallons of oil (around 5000 barrels) per day of oil leaking into the Gulf of Mexico was much too low. The flow rate was revised on May 27th to be between 12,000 and 19,000 barrels per day (around 500,000 gallons) of oil.

With this updated sheet, students work with rates, percentages, proportions and averages to further understand the magnitude of this event.


Chocolate Milk and Mixture Understanding

Chemistry experiments and algebra problems sometimes ask students to create percent mixtures or to change a mixture into a stronger or weaker solution by adding more of an ingredient. Students often have difficulty isolating the key concepts involved in this sort of problem. This investigation introduces the notion of changing percent mixtures through a fun class day that ends with a yummy treat.   This activity is perfect for a middle school algebra class or any high school math class.  Students set up and solve equations to solve mixture problems.

Classroom activity:  Teachers-Guide-Choc-Milk-and-Mixture-Problems.pdf

Classroom student practice:  chocolate-milk.pdf


For members we have an editable Word docx of the activity and solutions.

chocolate-milk.docx      chocolate-milk-solution.pdf


Everyone is talking about the new Apple creation. Use Brian's activity to analyze its costs, price per GB, and sales predictions.


For members we have an editable Word docx and solutions.

ipad.docx         ipad-solution.pdf

Geometry of Flooding

In 2010, March was so rainy that flooding was the topic of every newscast and many, many conversations.  The picture shows how students went home from school in Wayland Mass. on March 31st - on a Duckboat.

This two page investigation asks students to calculate the volume of water generated by inches of rain spread over the surface area of Massachusetts. Specific river catchment areas are then considered to understand the actual voluminous rise of the Sudbury River. Once the volume of water is calculated, students are asked to find approximate river depth change.  This activity could be used in any science or math class, especially if flooding in in the news in your area or nationally.


CCSS: 5.MD, 6.G, 6.EE, 6.RP, 7.G, 7.RP, HSG, HSF

For members we have an editable Word docx and solutions.

Geometry-of-flooding.docx       Geometry-of-flooding-solution.pdf

Quadratic formula on your calculator

You can program your TI calculator so that a quadratic equations can be solved quickly by just plugging the X ² coefficient, the X coefficient, and the constant into your calculator.

Arrange your equation in this form:

AX² + BX + C = 0

Program your calculator according to the following directions.

And you are all set to solve.