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Number Grid Puzzles
A 1st Grade Math Lesson
Amy Cattabriga
University of New EnglandEDU-723
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Number Grid PuzzlesAmy Cattabriga
I modified this lesson from the first grade Everyday Math curriculum. The original lesson, which
only involved discussing the patterns on the number grid and the worksheet, was initially presented to
the class by a substitute teacher. After the lesson, none of the students were able to complete the
worksheet. Attributing the students' difficulties to the fact that there was a substitute in the room, one
that they have had problems with in the past, we repeated the lesson the following day with similar
results. While the students seemed to have a good grasp on the concepts while they were working on
the rug, they could not translate those skills to the worksheet. It was at this point that I decided to
modify the lesson, breaking it down into two separate lessons and adding the hands on practice of the
human puzzles. I also added the two number grid games to help the students further practice the skills.
This is a math lesson plan and is intended for the third trimester of the first grade. As the skills
are ones that the students have continually struggled with (particularly counting forwards and
backwards by 10's on a number grid) it was presented to the whole class. The lesson is comprised of
two whole group lessons, two worksheets to be completed individually and two games that can be
played in small groups of two to four students. The lesson is also appropriate for smaller groups of
students with no modifications necessary.
To differentiate the lesson, students are given the opportunity to explore the patterns on the
number grid as a whole class, through worksheets and by playing games. They may use tools such as
the number grid on their nametags or the poster at the front of the classroom. They may also request
assistance from their peers in the form of clues and hints to help them determine answers to the human
number puzzles. For this particular lesson there is no need to plan for diversity perspectives, as the
students are all familiar with the tools being used (number grid, dice, etc.).
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Number Grid PuzzlesAmy Cattabriga
Number Grid Puzzles: Part I
Objectives: Fill in the missing numbers on a number grid using patterns and then solve the human number grid puzzles. Complete worksheet 9-3: Number Grid Pieces.
Key Concepts and Skills:1. Count forwards and backwards by 1's and 10's using a number grid (Number and Numeration
Goal 1).
2. Identify the value of digits in a two digit number (Number and Numeration Goal 3).
3. Extend patterns on a number grid (Patterns, Functions and Algebra Goal 1).
4. Solve number grid puzzles (Patterns, Functions and Algebra Goal 1).
Materials: Number Grid poster Sticky notes/slips of paper (to cover up numbers) Math flash cards, 4-6 cards grouped to represent a row or column on the grid Math Masters page 258 (pre cut into fourths) Folders or mini offices for privacy Overhead of Math Masters page 258 (optional)
The Lesson:Have the students identify the patterns they see in the numbers, including:
The numbers increase as you move down the grid. The numbers increase as you move to the right. The tens digit increases as you move down a column. The ones digit increases as you move to the right in a row. The ones digit stays the same in a column. The tens digit stays the same all the way across a row.
Next, ask the students to close their eyes. Remove or cover up a few numbers from the number
grid. Ask the students to determine the missing numbers, describing the pattern they used (responses
will vary, but will likely include "I counted up/back by ones/tens").
Once the students are comfortable with the concept take down the number grid poster and call
up a group of four to six students to the front of the room. Have them stand in a way that represents a
column or a row in the number grid. Hand one or two students a math flash card and ask the remaining
students in the group to determine what number they should be holding. They can ask their peers for
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Number Grid PuzzlesAmy Cattabriga
clues such as "Count up by 10's" but not for the answers. Depending on the students skill level you can
give them an answer key, a small group of numbers to choose from. Conversely, you can have the
students hold up the unidentified numbers so they cannot be seen and have their peers on the rug
identify the missing numbers. Figure 1.1 is a representation of what this may look like.
Figure 1.1: The students must use the patterns on the number grid to determine that the missing numbers are 12, 14, 15 and 17 respectively.
For today, stick to rows and columns of numbers, so that the students are only looking at one
pattern at a time. Repeat with different numbers until all of the students have had a turn.
Figure 1.2: ¼ of worksheet 9-3: Number Grid Pieces (adapted from Everyday Math).
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Number Grid PuzzlesAmy Cattabriga
Have the students return to their seats and pass out worksheet 9-3. Tell the students that this
must be completed individually (you can use folders or mini offices to separate them in necessary and
that they may use the number grid on their nametag. Students who wish to try it without the number
grid can flip their nametag over or push it off to the side. Once all of the students have completed the
worksheet go over it as a class. Have the students put aside their pencils and use crayon to correct any
mistakes. Draw a copy of the worksheet on the board or use an overhead sheet and call on students to
come up and fill in the missing numbers. Have them describe what pattern they used to determine the
answer. You can collect the correct worksheets for your own records or make notes about the students
successes and difficulties as the lesson progresses.
Conclusion:After the initial lesson, presented by the substitute, the students could not complete worksheet
9-3 individually, nor could they do it with a new set of numbers after hearing the lesson a second time.
After completing the hands on activity the students were presented with the worksheet a third time
with yet another set of numbers. This time the whole class was able to complete the worksheet and
several of the students did so without using the number grids on their nametags.
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Number Grid PuzzlesAmy Cattabriga
Number Grid Puzzles: Part II
Objectives: Fill in the missing numbers on a number grid using patterns and then solve the human number grid puzzles. Complete worksheet 9-3: Number-Grid Puzzles, found on page 180 of Math Journal 2. Practice working with patterns on the number grid by playing Number Grid Shapes using Activity Sheets 15 and 16 from Math Journal 2 and by playing the Number Grid Game.
Key Concepts and Skills:1. Count forwards and backwards by 1's and 10's using a number grid (Number and Numeration
Goal 1).
2. Identify the value of digits in a two digit number (Number and Numeration Goal 3).
3. Extend patterns on a number grid (Patterns, Functions and Algebra Goal 1).
4. Solve number grid puzzles (Patterns, Functions and Algebra Goal 1).
Materials: Number Grid poster Sticky notes/slips of paper (to cover up numbers) Math flash cards, 4-6 cards grouped to represent a small chunk of the grid Math Journal 2, page 180 and Activity Sheets 15-16 Dice and small playing pieces for the Number Grid Game Scissors Home Link 9-2
The Lesson:Assemble the students on the rug and remind them of the patterns they discussed in the
previous lesson, Number Grid Puzzles: Part I. Ask the students to name the patterns they observed. Tell
the students that today they are going to work with those same patterns and ask them to closer their
eyes. Remove or cover up a small chunk of numbers on the number grid poster. Refer to Figure 2.1 for
suggestions.
Figure 2.1: Suggested shapes for covering up numbers on the number grid (adapted from Everyday Math)
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Number Grid PuzzlesAmy Cattabriga
Call on the students to fill in the missing numbers, asking them to explain how they found their
answers. Students may find this more difficult than they did in part I, as it requires them to look at more
than one pattern at a time. If necessary, demonstrate to the class how you would solve the problem.
Once the students have mastered working with the patterns on the number grid, have them
repeat the human number grid puzzles, again using small chunks from the number grid instead of only
columns and rows. Be sure to cover up the number grid poster to ensure that the students are using the
patterns and not just looking at the poster.
Call up a group of four to six students to the front of the room and arrange them in the
appropriate pattern. Hand one or two students a math flash card and ask the remaining students in the
group to determine what number they should be holding. They can ask their peers for clues such as
"Count up by 10's" but not for the answers. Depending on the students skill level you can give them an
answer key, a small group of numbers to choose from. Conversely, you can have the students hold up
the unidentified numbers so they cannot be seen and have their peers on the rug identify the missing
numbers. Figure 2.2 is an example of what this may look like. Repeat using different sections of the
number grid until all of the students have had a turn.
Figure 2.2: The students must use the patterns to determine that the missing numbers are 42, 43, 53 and 55, respectively.
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Number Grid PuzzlesAmy Cattabriga
After completing the whole group lesson have the students play the Number Shapes Game and
the Number Grid Game and complete page 180 in Math Journal 2 (this can be a teacher directed
activity).
Number Shapes Game:Refer to figures 2.3 and 2.4 for Activity Sheets 15 and 16
This game is similar to the whole group activity done at the beginning of the lesson using the
number grid. Students can work in pairs or in teams of two. The students must first cut out the number
grid shapes on Activity Sheet 16. To play one student, or team of students, will cover their eyes or turn
away while their partner covers up a section of the number grid using one of the number grid shapes.
The first student, or team, must determine the missing numbers. Once they have figured out what
numbers are missing the students will switch roles. The second student will cover their eyes while the
first student covers up a portion of the number grid. Student can play for the entirety of the period or
there can be a set time limit.
Number Grid Game:Refer to Figure 2.3 for Activity Sheet 15 and Figure 2.5 for a copy of the rules. Students will also
require one die and two playing pieces. Students can play in pairs or as teams of two.
To play each student places their token on the 0 on the number grid (Activity Sheet 15). The
first student will role the die. How far they can more their token is determined by the number they role.
Figure 2.6 shows what each face of the die represents.
Figure 2.6: The Number Grid Game movement table (adapted from Everyday Math).
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Number Grid PuzzlesAmy Cattabriga
Students may only move forward 10 or 20 spaces if there is enough room on the number grid to
do so. If not they must move their token only 1 or 2 spaces. For example, if Player 1 has his token on 91
and proceeds to roll a 2 he must move forward 2 spaces, not 20.
The students will continue to take turns rolling the die and moving their token that many spaces
on the number grid. The first player to land on 110 with an exact roll is the winner.
The game can also be played with the game starting on 110 and the students working backwards
to 0, using the same rules.
Math Journal 2: Page 180Refer to Figure 2.7 for worksheet 9-3: Number Grid Puzzles 1.
Inform the students that the worksheet is set up like the number grid and has spaces for the
numbers 0-110. They need to fill in the missing boxes outlined in bold, using the patterns they have
been working with for the last two days. Students can use the number grids on their nametags to check
their work but they need to be able to discuss the patterns with a teacher if asked.
Homework:Students will take home and complete Home Link 9-3 (Figure 2.8). They need to show someone
at home how to solve the number grid puzzles, explaining to this person about the patterns they have
observed on the number grid. The homework will be discussed the following day during Morning Math.
Conclusion:When the students first attempted page 180 in Math Journal 2 they struggled with it. Figure 2.9
shows a student's initial efforts on the worksheet. The circled boxes represent areas where the student
had difficulty and needed teacher assistance to correctly fill in the boxes. After the supplemental
practice of the human number puzzles and the Number Grid games students were able to complete
page 180 much more easily, as evidenced by Figure 2.10. This student was able to complete the
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Number Grid PuzzlesAmy Cattabriga
worksheet without any assistance. Math Journal page 180 will be retained for remainder of the school
year as a record of how well the student comprehended the lesson. Any additional help the student
receives on this concept will be determined by this as well as observations made while the student
played the two number grid games. The students will be further assessed on this concept, as well as the
other concepts discussed in unit 9 in the Final Unit Assessment provided by Everyday Math.
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Number Grid PuzzlesAmy Cattabriga
Figure 2.3: Number Grid Worksheet for the Number Shapes Game and the Number Grid Game (adapted from Everday Math)
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Number Grid PuzzlesAmy Cattabriga
Figure 2.4: Shapes for the Number Shapes Game. These shapes have been cut and pasted from the original Activity Sheet 16 (Everyday Math) for the purpose of this paper.
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Number Grid PuzzlesAmy Cattabriga
Figure 2.5: The rules for the Number Grid Game (adapted from Everyday Math).
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Number Grid PuzzlesAmy Cattabriga
Figure 2.7: Math Journal 2, page 180: Number Grid Puzzles 1 (adapted from Everyday Math).
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Number Grid PuzzlesAmy Cattabriga
Figure 2.8: Number Grid Puzzles 1, completed by a student prior to participating in the revised Number Grid Puzzles lesson. Circled sections indicate where the student was initially incorrect (worksheet from
Everyday Math).
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Number Grid PuzzlesAmy Cattabriga
Figure 2.9: Number Grid Puzzles 1, completed by a student after participating in the revised Number Grid Puzzles lesson. This student was able to complete the worksheet without any additional assisstance
(worksheet from Everyday Math).
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Number Grid PuzzlesAmy Cattabriga
Figure 2.10: Homework corresponding to the Number Grid Puzzles lesson (adapted from Everyday Math).
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Number Grid PuzzlesAmy Cattabriga
References
Everyday Mathematics. http://everydaymath.uchicago.edu/