Title: Mapping A Stream
Submitted by:
Subject Area: Science, Math
Intended Grade Levels: Seven and Eight
Description:
Narrative:
The project requires discipline, teamwork, and stresses individualized strengths of each student to complete the project. Some students shine in one area, other students in another, but overall the specific talents of each student complement the mapmaking. Underachieving students often show remarkable aptitude in the work taking place outside of the regular classroom.
Students see progress over time. The beginning of the plan teaches students to set a rectangular table to scale, by the end of the project these same students are making transect measures of a curved portion of an irregular stream bank and plotting this data onto paper. Progress is best seen, however, as the map begins to take shape and stretches over several meters.
Mapping the stream encourages the Standards of Authentic Instruction in that interpreting the collected coordinates and translating them onto a piece of paper is not an easy task. Students must be proficient at taking measurements. Students are required to analyze and evaluate these measurements to make sure that one set of data points corresponds to the next. The final product is a large map which students create by practicing proper measurement and using scale and orientation.
Basic forms of technology create a link to math and science and are used to collect data and complete the map. Both compass reading and using a protractor help students make and record the necessary measurements. One of the strengths of this project is that students are in the field using cartography tools to collect field data used to synthesize the map in the classroom.
Curriculum Benchmarks:
MI.SCI.I.1.MS.4 Use measurement devices to provide consistency in an investigation. (Key concepts: Documentation&endash; laboratory instructions. Measurement units&endash;milliliters, liters, teaspoon, tablespoon, ounce, cup, millimeter, centimeter, meter, gram, nonstandard units. Measurement tools: Balancing devices, measuring cups and spoons, measuring tape. Real-world contexts: Cooking for groups of various sizes; following or altering laboratory instructions for mixing chemicals.)
MI.SCI.I.1.MS.6 Write and follow procedures in the form of step-by-step instructions, recipes, formulas, flow diagrams, and sketches. (Key concepts: Purpose, procedure, observation, conclusion. Real-world contexts: Following a recipe; listing or creating the directions for completing a task.)
MI.SCI.II.1.MS.3 Show how common themes of science, mathematics, and technology apply in real-world contexts. (Thematic ideas: Systems-sub-systems, feedback models, mathematical constancy, scale, conservation, structure, function, adaptation. Real-world contexts: See Using Scientific Knowledge.)
Total Amount of Time for Lesson
Materials/Hardware/Software
- meter or yard stick - teacher preference;
- 15 sheets 48" by 24" white poster board;
- compass - 2 for each student team;
- waterproof measuring cloth tape - 100 foot or 30 meter - teacher preference;
- 25 foot/10 meter measuring tape, teacher preference;
- round protractor/compass
- large variety colored pencils;
- plenty of #2 pencils; and
- 1 notebook per student group.
Teacher Preparation
Prerequisite Student Skills
mathematics, and use a light touch when drawing.
Student Activities/Procedures
Day 1
Students use rulers to measure perimeters of desks, distances across a classroom, in short, any variety of distances from point A to point B. Accuracy and precision are both stressed to assure students repeatedly make the correct measurement.
This step requires 20 minutes.
Using lecture, students are next introduced to the concept of scale in drawings.
Lecture step requires 30 minutes.
Day 2
The concept of scale is reviewed in a recitation period. Student activity is to then measure tabletops and figure the proper scale to use to put an outline of the tabletop onto a standard sheet of graph paper. Close work between student groups and the teacher is imperative during this activity.
This step requires 55 minutes.
Day 3
Measurement and scale drawing is further stressed as students measure the room perimeter and any tables, desks, etc. in the room and then draw an outline of the room and the major pieces of furniture.
This step requires a 55-minute period.
Days 4, 5
Students are taken to a portion of the school hallway, preferably one with several doorways, and other structures such as fountains, trashcans, etc. Students measure all pertinent aspects of the hallway section and record these measurements in a notebook. Students are told this is only trip allowed to the hallway.
This step requires two 55-minute periods.
Day 6
Students use measurements taken during Days 4 and 5 to make a scale drawing of the hallway section. Inclusion of doorways, fountains, trash cans, etc. in the drawing is required for full credit.
This step requires 55 minutes.
Day 7
Using spray paint, teachers apply to the outside ground two wavy lines which represent the two banks of a stream. The lines should be between 10 - 20 yards in length, vary from 1 to 4 feet apart, and have both straight passages and curved portions. Students then use these lines to practice making stream measurements. Measurements are taken as follows:
A. DETERMINING DIRECTION AND LENGTH - starting at one end of the lines, students stand in the middle between the two lines - a straight reach beginning at the end of the painted lines to the first curve is selected
- a compass is used to determine magnetic north of this reach
- the compass is used to take the degree reading of this first straight reach
B. TRANSECTING STREAM BED
- measure down the center the length of the first straight reach - starting at one end of the curved painted lines, measure stream width
- every 50cm along the reach make another measurement of stream width
- continue in this manner until the entire length of first reach is transected every 50cm
- repeat until entire stream drawn with paint is transected
- to avoid marking the same portion of the same stream twice or more flags are used to indicate a reach that has been measured.
After this procedure, students will have set of data which includes for each straight reach a:
- length; - compass bearing;
- transect widths; and
- number and order of each reach.
This procedure requires 55 minutes.
Days 8, 9
- establish magnetic north point on the paper
- determine where to begin drawing on poster to fit the entire stream
using the least number of sheets
- draw starting point compass direction of reach relative to established magnetic north
- mark the beginning width of stream bed at starting point on poster
- proceed to mark every stream width according to scale set earlier
- work until entire stream bed is drawn onto poster board.
This procedure requires two 55-minute periods.
Day 10
This procedure requires 55 minutes PLUS travel time.
Day 11
- two people to determine each straight run of stream bed, also these two will measure the length of each straight run
- one person to mark the transects at each 50cm along the stream and measure the width of each transect
- recorder of the following data:
- degree reading for each run
- number of transects along each run
- width of each transect reading taken
- important topographical features along the run
This procedure requires 20 minutes.
Next, take groups outside and either using spray painted stream bed from Day 4 OR simply using another spray painted stream, have the groups each take a series of measurements so that each student becomes familiar with their position within the group. This is meant as a practice before the actual first trip to the stream.
This procedure requires 30 minutes.
Day 12
Days 13 - 15
Day 16
Time required varies, but usually 55 minutes.
Day 17
Time required is 55 minutes.
ASSESSMENT/EVALUATION
Technical impact is measured by determining individual student proficiency using the tools of the trade such as compass, circular protractor, and measuring tape both when making field measurements and translating the data into the drawn map.
Benchmarks are graded by:
- making accurate and precise measurements; and
- following a complex set of directions beginning with taking measurements in the classroom to completing a colored map drawn to scale.