Session 8 — Our Class Data Book · Grade 2 Data Science 1 / 15
Session 8 of 8 — Capstone
Data Science for Young Minds · Grade 2

Our Class Data Book

Today we turn your tally chart into a bar graph, write one big conclusion, and put it all together in a Class Data Book that belongs to everyone.

~50 min Ages 7–8 Bar Graph + Writing Capstone Celebration
What We'll Do Today

Today's Plan

0–12 min
Hook + Review
Tally chart → bar graph connection
12–38 min
Draw Bar Graph + Write Conclusion
Use your Session 7 tally chart
38–44 min
Cover Page + Data Book
Design your page, assemble together
44–50 min
Brain Break + Celebration
Data dance + "We Are Data Scientists!"
Hook (0–5 min)

Look What We Can Do!

We started the year not knowing what data was. Look how far we've come:

🔍
We found data
Session 1
❓
We asked questions
Sessions 2–3
📋
We made tally charts
Sessions 4–5
📊
We read bar graphs
Session 6
🎤
We ran our own survey
Session 7
📖
We make the Data Book
Session 8 — TODAY!
Review (5–12 min)

Tally Chart → Bar Graph

Every number in your tally chart becomes a bar. Let's see how:

Tally Chart (Session 7)
Soccer    ||||   4
Basketball   |||   3
Swimming   |   1
Bar Graph (today)
Soccer
4
Basket
3
Swim
1
Each total number = the height of that bar. That's it!
Drawing Your Bar Graph (12–30 min)

8 Steps to Your Bar Graph

  • 1Look at your Session 7 tally chart totals
  • 2Draw a y-axis (up) and x-axis (across)
  • 3Label y-axis: 0, 1, 2, 3, 4, 5, 6, 7, 8
  • 4Write your answer choices along the bottom
  • 5Draw a bar for each answer — count up the squares
  • 6Color each bar a different color
  • 7Write your question as the graph title
  • 8Check: bar height matches tally chart total?
The worksheet grid is already drawn — just add your bars, labels, and title!
Bar Graph Tips

Helpful Tips While You Draw

  • 💡Use a ruler to draw straight bars — straight bars are easier to read
  • 💡Count the squares carefully — touch each square as you count up
  • 💡All bars should sit on the x-axis — like buildings on the ground
  • 💡The title tells the reader what the graph is about
  • 💡Imperfect bars are fine — what matters is the right height
    • Ask your teacher if you're not sure about any step — we're here to help!
    Write Your Conclusion (30–38 min)

    What Did You Find Out?

    Pick ONE sentence frame and complete it about your data:

    "My question was ___ and I found out that ___."
    "The most popular answer was ___ with ___ votes."
    "I was surprised that ___ because ___."
    "Next time I would ask ___."
    Write your sentence on Part 3 of the worksheet. You can also draw a picture to show what you found out!
    Cover Page (38–44 min)

    Design Your Cover Page

    Your cover page is the front of your page in the Class Data Book. Make it yours!

    ✍️
    Write your name
    🎨
    Draw your favorite data finding
    ⭐
    Add "I am a Data Scientist!"
    Your cover page + bar graph + conclusion all go into the Class Data Book together.
    Brain Break (44–47 min)

    Data Dance! 🕺

    When the teacher calls a data word, do the move!

    "TALLY!" → slash arm like a tally mark
    "BAR GRAPH!" → stretch arms up tall like a bar
    "SURVEY!" → pretend to ask your neighbor a question
    "DATA!" → tap your head (thinking!)
    "MOST!" → jump up as high as you can
    "LEAST!" → crouch down as low as you can

    Go fast! Teacher calls words quickly — stay sharp!

    Class Data Book Assembly

    Putting It All Together

  • 1Everyone brings their worksheet pages to the front
  • 2Teacher calls each student's name — add your page to the book
  • 3Add the cover page on top
  • 4Bind together — now it's a real book!
  • 5We read two pages together as a class
    • Every page goes in. Every person belongs. 📖
    Reading Our Book Together

    Let's Read Two Pages!

    The teacher picks two pages to read aloud together. For each page:

  • ❓"What was their question?"
  • 📊"Which bar is tallest? Which is shortest?"
  • 💬"What did they find out?"
    • After session, keep the book somewhere the class can browse it — library shelf, classroom display, or reading corner.
    Vocabulary — All 8 Sessions

    Words We Know Now

    Data
    Information we collect and count
    Survey
    Asking many people the same question
    Tally
    Marks to count quickly in groups of 5
    Bar Graph
    A picture that shows data with bars
    Most / Least
    The highest and lowest values in a graph
    Compare
    Look at two things side by side
    Sample
    The group we asked — not everyone
    Results
    What we found out from our data
    Celebration

    You Did It! 🎉

    ❓
    Asked Questions
    📊
    Collected Data
    📋
    Made Tally Charts
    📈
    Drew Bar Graphs
    💬
    Wrote Conclusions
    📖
    Made a Data Book
    That's what data scientists do — and YOU did all of it!
    Closing Ritual

    Class Call-and-Response

    Teacher: "We asked a question..."
    Class: "We're curious!"
    Teacher: "We collected data..."
    Class: "We're scientists!"
    Teacher: "We made a graph..."
    Class: "We showed the world!"
    Teacher: "We are..."
    Class: "DATA SCIENTISTS!!!" 🔬
    The End
    🔬

    We Are Data Scientists!

    Grade 2 · Data Science for Young Minds · All 8 Sessions Complete

    Keep our Class Data Book in the classroom — read it anytime!
    Share your findings with your family tonight!
    Look for data in the world around you — it's everywhere!