Student Worksheet — Session 4: Making a Tally Chart

Data Science for Young Minds · Grade 2 · Ages 7–8

Name

Date

Class Period

Part 1 — Vocabulary

Tally mark

Tally chart

Total

Frequency

Part 2 — Tally Mark Practice

Remember: | = 1 | | = 2 | | | = 3 | | | | = 4 𝄻 = 5 (four lines + one crossing mark)

Draw the tally marks for each number:

How many tally marks are shown? Write the number:

𝄻 | | =

𝄻 𝄻 | | | =

𝄻 𝄻 𝄻 =

Part 3 — My Tally Chart

Use your survey results from Session 3. Fill in the tally marks and totals.

Season	Tally Marks	Total
Summer
Fall
Winter
Spring
TOTAL

Part 4 — Read My Chart

Use your tally chart to answer these questions:

Which season got the most votes?

Which season got the fewest votes?

How many total responses did you collect?

Did any two seasons get the same number of votes? Which ones?

Part 5 — Think About It

Why is it easier to count tally marks in groups of 5?

Take-Home Challenge — Tally Anything!

Tonight, count something at home using tally marks. Ideas: cars that pass by in 5 minutes, books on a shelf, items in the fridge, steps from your bedroom to the kitchen.

What I counted:

My tally marks:

Total count: