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This activity made teaching the Domain and Range tangible for my students. It is a matter of pretending to hold a Flash Light and figuring out where the shadow falls on the x-axis and the y-axis
A visual representation on how to use the flash light is included in this activity. Students will cast a shadow using colored pencils.
There are 60 different graphic representations of relations. (only graphic representations). Students will need to feel comfortable with the Vertical Line Test. At the top right corner of every card, there is either a dot, 2, 3, or 4 based on the level of difficulties of the question. This could be used as a guide as you're selecting which questions to use.
There are several ways to use these 60 cards. The goal will be to determine the:
• If the relation is a Function or not
Included in this activity is a definition handout consisting of the definition of Domain, Range, Function, and Vertical Line Test. Also, included in this file you'll find two different forms, A & B.
There are many different ways these cards and the forms could be used.
Option 1 (use Form 1) - As Task Cards (each group gets all 4 levels)
• Divide class into groups of 4.
• Each group should get 8 task cards (2 of each of the above levels)
• Students would complete form (1) with their answers (as many task cards as desired)
Option 2 (Use Form 1) - As Task Cards (each group gets one single level)
• Divide class into groups of 4 (or as you wish)
• Each student in the group gets 1 task card
• Each student gets one answer form 1
• Each student completes his card and pass it to the right. Each student would have to complete 4 task cards
• When all completed, students present their answers and discuss their findings.
Option 3 (Use Form 2) - Like Scavenger Hunt
Place the graphs around the room (you may use all levels, or just focus on a specific level based on the dots on the cards)
You may have students work individually by rooming around the room and matching AS MANY DOMAINS/RANGES AS POSSIBLE. Or, divide students into groups of 2, 3, or 4 and ask them to work together to match the graphs to the form
When students start, ask them to start at different card number.
Option 4 Matching
• This activity maybe done in groups or pairs or individually (could be used while out with a sub)
• Each student gets Form 2 as well as the set of questions
• Students will match the graph with the answer.
• You may want to pair up students or put them in groups. This is very similar to scavenger hunt, however, students will not be moving around the room.
I divided my class into 3 groups. The first group got cards 1-20, the second group got cards 21-40, and the third group got cards 41-60. Accordingly, each group received the corresponding part of Form 2. My students worked in their groups to match the graphs with the un-ordered answers on Form 2.
Option 5 (Use Form 1) - Determine whether the given relation is a function or not (no need to work with Domain or Range)
This activity maybe done in groups or pairs or individually (with a sub as well)
Each student gets a copy of form 1 as well as the set of questions
Students will determine whether the given relation is a function or not. No need to consider working with the domain or range if this concept is not discussed in class yet.
Option 6 Work Sheet - Use the Blue Bordered Cards
Print the cards you wish your students to work with.
Students would need to colored pencils in this case. One to use for the domain and another to use for the range.
Students will answer the worksheet and write on the printed cards.
This activity helps students to become comfortable with the meaning of the Domain, Range, & Functions. There are many different modules represented in this activity.
Students will feel better after this activity as they understand the concept better while working as a team.
The Answer Keys of Forms A & B are included in this activity. The answer key is provided using interval notation.
This activity is a great tool for differentiation. It could be used as a review before a quiz or a test on this topic, TASK CARDS, Cooperative Learning, ... et .. It is a great way of "Cooperative Learning". It also could be used as a formative assessment.
On a final note, Printing Directions are provided as to give you the option printing on graph per page or more.
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