Topic: Map and Compass

Concept: Declination (magnetic variation)

Skill: Orient a map using the correct declination.

Objective: Students will be able to orient a map in the field by taking into account declination.  They will also be able to describe the difference between map north and magnetic north.

Lesson activities: (materials needed: maps, compasses, pencils, rulers.)

    Start with a discussion about "true" north and magnetic north.  Why is there a distinction and how does it affect our use of the map and compass?  Whole group lesson will include the use of a globe and overheads for illustration of the two norths and how magnetic variation is different in different locations.  Demonstrate how to put magnetic north lines on the map for use in orienteering.  Have students draw the lines on their map.  Review our compass setting lesson from the day before with modifications for magnetic north.  Go outside for practice in orienting maps.  Present the concept of triangulation to determine one's location using a map and compass.  Have students in pairs plot their location using triangulation.

A reading assignment covering the rules of an orienteering event will be given at the end of class for homework.

Diagnostic Assessment: What do the students already know about the difference between true and magnetic north?

Formative Assessment: Are the students having success in orienting their maps?  Are they able to use the map and compass in combination to determine their location?

Summative Assessment: Check for accuracy of the location students determined using triangulation.

Grading:  Participation only.

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