Connecting Math To Real Life.

One way to keep students engaged is to connect math to the real world.   Unfortunately, that isn't as easy was we would like because too many "real world" examples have no context and are no better than textbook problems.

One such problem I saw asked students to add several lengths of boards together to get a total.  Too many of my students see this as just another problem to do, rather than understanding why you might want to do this.

Why not give students a choice of several different wood building projects to calculate the amount of wood needed, total cost, and even the cost of the screws etc.  I brought up a set of plans for building a rustic bookcase which included a drawing, a supply list, and a cut list.  The supply listed things like one four foot 1 x 12 and two 8 foot 1 by 12's for a total of 20 feet of 1 x 12's.  This opens up a discussion in how lumber is labeled and sold.  What do they mean for a 1 x 12?  What lengths is it sold in?  Is the cost going to be per foot or for a whole length?  Using the cutting list, check to see how much left over there is once all the pieces are cut so students can calculate the amount of waste.  It is fairly easy to have students look prices up online for the various pieces of wood on the list.

In regard to recipes, most of the time the examples are asking students to figure out how to enlarge or reduce a simple recipe for 6 people.  Honestly, I know of very few people who actually sit down and turn a recipe for 6 into one to feed 18.  They just make three batches of whatever on the other hand, what about starting with a recipe made for 300 and cutting it down to feed 30.  On the other hand, when feeding larger groups of people, they usually calculate so much per person.  For instance when calculating portions for a large turkey dinner, they think about 1/2 to 3/4 cup of stuffing per person, or 1/3rd of a pound of raw potatoes per person.  Ask students to figure out the list of supplies needed to feed 300 or 450 people for a Thanksgiving meal and then calculate the cost of purchasing the supplies.  This site has a good breakdown for the amount of food needed per person.

I love having students design their dream bedroom and then calculate the amount of flooring, wall coverings, or ceiling needed to finish the room before having them calculate the cost.  In addition, I have them write up and turn in an estimate of the final cost of the room.  This exercise requires students to calculate square feet and depending on the product they might have to convert that to square yards for carpeting or leave it in square feet for flooring but they have to see what unit the wood flooring is sold in before they can determine how much they need to buy.  Furthermore, most cans of paint are labeled with the amount of area it covers so they have to keep that in mind.  I love this because it is real world math and they might look at the same types of things if they wanted to remodel their rooms.

A similar project to this is asking students to calculate the cost of remodeling their kitchen.  The remodel should include new cabinets, new appliances, new paint, and new flooring.  Again, they have to figure out how many cabinets they need and which ones they want assuming they are going with the commercial cabinets sold at Home Depot in order to find the cost.  Will they be painting or finishing those?  If so, they'll have to include the cost of the finish. What type of flooring will they use because that can add quite a bit of cost to the overall bill.

Another real world possibility is asking students to calculate the cost of outfitting a new office building with basic furniture of desks, file cabinets, and chairs.  This adds one more layer on the calculations and they will do it using a blueprint showing where everything is.  They can find costs for office equipment at Office Max or Staples.  Real life use of mathematics.

All these activities link math to the real world with context and depth.  The activities are not superficial but reflect possible real life activities someone might come into. Don't just find a worksheet on the internet, ask yourself how you can expand it so it relates to real life better.  Before I became a teacher, I had to prepare a quick cost sheet showing how much it was going to cost the company in overtime to have x number of workers come in on a Saturday to complete a project.  Let me know what you think, I'd love to hear.