Problem 15 · Firefly JarsPrint one blank worksheet now, or prepare a family or classroom packet.
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Name
Date

Firefly Jars

Earn one jewelZircon FragmentLevel 1

Each small firefly picture counts as 1 firefly.

  1. Circle the jar with 5 fireflies.

  2. Jar D has 3 fireflies. Draw more in the big Jar D. Stop when it has 5. Write how many more you drew.

A large Jar D with 3 fireflies and open space to draw more.

More drawn:

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Full rating evidence

Difficulty & skills

Designed for Kindergarten · Uses Late Kindergarten math · About 1–3 minutes

Kindergarten · Number and operations · Counting and cardinality

MJ K.7 · C1 · W1

MathJewels rates content readiness, problem-solving challenge, and workload separately. These estimates describe the easiest reasonable solution path and do not reveal the solution.

Content level

MJ K.7

Grades K–2

Kindergarten progression · point 7

Likely range
MJ K.4–K.7
Confidence
91%

Challenge

C1 · Routine

A direct application of a familiar method.

  • Method selection0
  • Reasoning depth1
  • Novelty0
  • Constraint management1
  • Proof or justification0

Workload

W1 · Light

A short response with only a few steps.

Active time
1–3 minutes · typically 2
Response
Construction
Known-method steps
5
  • Mechanical execution1
  • Written output1
  • Representation production1
  • Bookkeeping0

Learning focus

Skills this problem practices

What a successful response demonstrates, with each skill’s share of the content rating.

  • Count and compare within 20

    Count concrete objects or actions up to 20 with one-to-one correspondence, name the total, and compare counted quantities using more, fewer, or the same.

    • Independent mastery
    • 55% focus
    • MJ K.7 milestone
  • Compose and decompose within 5

    Compose and decompose concrete quantities through 5, including recognizing a whole as two smaller parts in more than one arrangement.

    • Independent mastery
    • 45% focus
    • MJ K.7 milestone