Making Predictions

Lucille Chambers               Lyman Trumbull School
18853 Center Ave.              5200 N. Ashland Ave.
Homewood, IL. 60430            Chicago, Il. 60640
708-799-4536                   312-534-2430
              
Objectives:

This outside activity will help students at any level learn to classify and make 
predictions and will teach students about ecology and plant life at the same 
time. 

Materials Needed:

Clothesline wire (cut to 88 3/4 inches in lengths)      
Paper and pencil
Masking tape
Twine                                                   

Strategy:

Discuss with students that their school grounds and neighborhood parks can be 
the perfect setting for a math lesson.  Let's call this activity "Hoop It Up". 

MAKE THE HOOP: 
1) Cut five pieces of wire 88 3/4 inches long.  (Add an extra inch for overlap.)  
2) Bend the wires to make hoops.  
3) Tape the wire together.  
4) Cut ten pieces of twine.  
5) String two lengths of twine across each circle to make four quadrants.  (A 
   hoop this size will represent about 1/10,000th of an acre.  There are 43,560 
   square feet in an acre and 1/10,000th of this is 4.356 square feet, which is 
   the area within the hoop.) 

Directions:     

Divide the class into groups of five and give each group a hoop.
Take the class outside on the school grounds or to a park and have the students
  toss their hoop onto the ground.
One student should stand beside each quadrant and the fifth should stand near
  the hoop with paper and pencil to record the information. 
Have each student count the number of things he/she finds within their quadrant. 
The students will count plants, insects, rocks and other non-living things. 
Students will relate each item that they count to the group secretary. 
Upon returning to the classroom ask students to classify their objects in three 
  groups: plant, insect or mineral.  
Question: Which group found the most objects in each category?  
Students will predict how many of one item, plants for instance, would be found 
  in a whole acre. 
To do this each group should total the number of plants in its four quadrants.  
The hoop represents 1/10,000th of an acre.  The groups must, therefore, multiply 
  their totals by 10,000 (Primary children will need assistance in doing the 
  math operations).  
Compare the groups' totals.  Question: Are the totals similar?  
If not, discuss why the groups got different results.  
Were some parts of the ground more lush than others? 
A more accurate prediction can be made by following these steps: 
    1) Add the total number of plants found in all groups. 
    2) Divide by the number of groups and multiply the quotient by 10,000. 
Have the students perform this operation and make similar predictions with other 
objects on the list.