Title: Everyday Math (Animal Weights) 
Date: Wednesday, November 8, 2007 
Standards:
Patterns, Functions and Algebra goals (From Everyday Mathematics curriculum)
Benchmarks per ICCSD:
Algebra  Know how to explore algebraic concepts and processes.
Whole Numbers: Concepts of Operations and Computation  Use addition, subtraction, multiplication and division of whole numbers.

Materials:
 Whiteboards + Markers
 Chart paper + markers
 Animal Cards (from activity sheet 7/8)
 Two Kinds of dice
 Math masters 353 (shaker) copies; 139
 Counters (for Shaker TopIt)
 Math Journal Pg. 88, 86
 Paper Plates + base10 blocks

Procedure (approx. 55 min):
Launch: Mental Math, Message, and introduction (15 min)
 Dominoes, and ask students to write a number fact for the numbers on the dominoes (Part + part= total)
 Message: Fox = 14 lbs. Cat = 7 lbs. If they were to both be sitting on a scale, what would be their total weight?
 How do you know that? What strategies did you use? What materials could you use to figure that problem out? (Math materials?)
 Record students suggestions on Chart paper
 Model how to find weight using base10 blocks as a strategy. Have students bring their notebooks to group, to work together. J
 Introduce the abbrev. Lbs. for pounds.
 Use Animal Cards; show how both sides look the same, but are showing two different things. These numbers represent what you could expect from that animal, but often differ, just as people weigh lots of different things.
 Show, on the board, how to do so for the raccoon and fox.
 Show, how to do the Cat (7) and Koala (19)…Ask students to explain how they got the answers.
 Repeat routine, having student volunteers come to the board (while remaining students use their) Boy/Girl; Raccoon/Eagle; Cat/eagle; koala/fox.
Additional Explore:
 Shaker Addition TopIt
 Solving PartsandTotals Problems (Independent)
 p. 139 MM, plates, base10 blocks
 StartChangeEnd
 Second graders challenge
 Math Boxes pg. 86 then 88
Summarize: Share strategies using base10 blocks, other materials, or written records. 
Enrichment:
4 partners using polyhedral dice.
Shaker Addition TopIt.
StartChangeEnd
3 animals
 # stories/sentences
Record in notebook (MODEL how to do)
 Draw what they did w/unit10 blocks
+
Animal Weight TopIt
 Need both partners’ sets of cards.

Readiness: Independent
Part, Part, Total paper plates using base10 blocks (using Math Masters pg. 139)
Divide paper plate into three sections. Total is on the top, with the two parts on the bottom.
