Triangle- A three-sided polygon

Square- A four-sided polygon with four congruent sides

Rectangle-A four-sided polygon with two sets of congruent sides

Pentagon- A five-sided polygon

Hexagon- A six-sided polygon

Parallelogram- A four-sided polygon with two sets of parallel sides

Polygon- A closed two-dimensional shape with all straight lines

• The students will add decimals/money correctly.
• The students will identify two dimensional figures

This lesson will take approximately two 40 minute periods. 

• Shape key   
• Colored construction paper
• Price tag for amount spent on entire picture
• Show your Work Page
• Assessment Page
• Teacher Made Example
• Scissors
• Glue
• A triangle, square, rectangle, parallelogram, pentagon and hexagon with price tags ranging from one cent to 99 cents.

Instructional Practice:  Active Participation, Independent Practice, Hands-On Activity, Tactile Learning

Webb’s Depth of Knowledge:  Skill/Concept, Strategic Thinking, Extended Thinking

W: WHERE/WHY/WHAT

This lesson is most appropriate for students who need enrichment in adding decimals and money.  The lesson is also appropriate for students needing additional practice and/or enrichment with polygons.

H: HOOK

This lesson will allow students to have the opportunity for enrichment in adding money/decimals and identifying polygons.  The students who do not love math, but may enjoy art, will have a chance to bring them together. Students will also have the chance to apply math to a real-world activity.

E: EXPLORE/EXPERIENCE/EQUIP

Students will have the chance to use decimals/money and polygons to build a picture of a real-life object.

R: RETHINK/REHEARSE/REVISE/REFINE

While taking part in the activity, students will be able to fine tune their decimal addition skills.  Students will need to continually add and delete polygons to get their set price to spend on their picture.

E: EVALUATE

Students will be informally assessed during activity via teacher observation.  Students will be formally assessed via the teacher-made checklist.

T: TAILORED

This lesson is tailored to a fourth grade student who has mastered the basic skills of addition of decimals through tenths and has been introduced to the different types of polygons. Students will be able to tailor the difficulty of their pictures by using more (or fewer) polygons.

O: ORGANIZED

Activity is review/enrichment lesson.  The lesson is organized into introduction, modeling, independent activity and assessment.

1. Teacher will have shapes (triangle, square, rectangle, pentagon, parallelogram, and hexagon) in front of class.  Teacher will ask volunteers to name the shapes.
2. Teacher will have shapes in front of class with price tags on them.  Teacher will have the students add the prices of the shapes for a total cost. Teacher will then take two shapes away.  Teacher will have students add up prices to get new total.
3. Teacher will then share teacher-created picture made with target shapes.  (Teacher should have prepared in advance a picture of a house, robot, city, etc…) The price tag should be attached to picture. Teacher will share the criteria of the shape key to identify costs for each shape.
4. Teacher will guide students through adding the prices of the shapes in example picture.
5. Teacher will explain to students that they will be creating a picture using the polygons from the shape key only.  The shapes may be any color or size, but they can only use those specific shapes. The teacher will tell the students that they will be assigned a price.  They will have to spend that exact amount on their picture.
6. Teacher will assign every student an amount that needs to be spent on picture.  This can be anywhere from 99 cents to $5.00.  (The students needing a more challenging activity should be assigned the largest amounts.)
7. Teacher will share assessment checklist for students to self-assess throughout creation.

shape key and show your work.docx

http://www.math-play.com/soccer-math-adding-decimals-game/adding-decimals-game.html

Students can practice adding decimals while playing a fun, interactive soccer game.

http://www.math-play.com/types-of-poligons.html

Students can practice naming polygons while playing a fun, interactive game.