Kindergarten Spring Math — Compose/Decompose to 10, Addition & Subtraction within 10, Teen Numbers as Ten-and-Ones, Measurement, and Classification
Lesson 5 30 min math.gK.s.lesson_05

CGI Story Problems — Join Result Unknown (5 Birds and 3 More)

Skills targeted
Objectives
  • Students can re-tell an addition word problem in their own words before solving (MP.1).
  • Students can solve a Join Result Unknown problem using objects, drawings, or equations (MP.4).
  • Students can use the sentence frame 'I had ___, then ___ more came, so now I have ___.'
Vocabulary
story problemaltogetherjoinedmoreresult

Lesson plan

Warm-up

5 min

Number Talk: teacher flashes a dot card showing 8 dots in two groupings (5 left + 3 right). 'How many? How did you see them?'

Teacher moves
  • Use sentence frame 'I saw 8 as ___ and ___'
  • Affirm 5-and-3 seeing as today's anchor decomposition

Direct instruction

8 min

Today the Math Detectives get a STORY mystery. Listen carefully: 'There were 5 birds in a tree. Then 3 more birds flew up and joined them. How many birds are in the tree altogether?' That's our story. Before we solve it, we have to UNDERSTAND it. Who can re-tell the story in your own words? (Take 2-3 retells.) Good. Now we use our detective tools to solve it. I'll show you with two-color counters. (Put 5 yellow counters on the rug as 'starting birds'.) Five birds in the tree. (Add 3 red counters, joining them with the yellows.) Three more birds joined. (Count all.) 1, 2, 3, 4, 5, 6, 7, 8. EIGHT birds altogether. Now I write the equation: 5 + 3 = 8. And I can draw the number bond: 8 / 5, 3.

Key examples
  • Four PLUS two EQUALS six. The story tells us to ADD because dogs are JOINING.
    model Act out: 4 children stand, 2 join. 4 + 2 = 6.
    prompt Story: 4 dogs at the park. 2 more dogs come. How many dogs altogether?
  • Three PLUS four EQUALS seven. JOINING again.
    model 3 yellow counters + 4 red counters; 3 + 4 = 7. Number bond 7 / 3, 4.
    prompt Story: Lin has 3 stickers. Maya gives her 4 more. How many does Lin have now?
Checks for understanding
  • What does the story tell us happened? (Listen for 'joined' / 'more came' / 'put together'.)
  • Did the number get BIGGER or SMALLER when more came? (Listen for 'bigger'.)
Media
M-K-S-AT-05-A Illustration
Children's book illustration of a leafy green tree on a bright blue sky background. 5 colorful cartoon birds (mixed colo

Children's book illustration of a leafy green tree on a bright blue sky background. 5 colorful cartoon birds (mixed colors: blue, red, yellow, green, orange) perch on the branches. 3 more birds (different colors) are mid-flight approaching the tree from the right, with motion lines. Below the tree, a number bond template (empty) sits on a grassy ground with the number 8 question-marked. Style: warm watercolor, kindergarten-picture-book aesthetic.

Guided practice

10 min
Tasks
  • Pairs work through 3 story problems. For each: (1) one partner reads the problem aloud, (2) the other partner re-tells in own words, (3) both build with counters or act out, (4) both write the equation. Problems: (a) 6 fish in a bowl + 2 more fish = ?, (b) 4 books on a shelf + 3 more = ?, (c) 5 carrots in a basket + 4 more = ?.
    scaffold Story-problem mat with three action zones (START / JOIN / RESULT) for fixed-position scaffolding.
  • Share-out: one pair presents one problem to the class with their solution narration.
    scaffold Vertical board for the presenting pair.
Media
M-K-S-AT-05-B Interactive Physical / non-image

Laminated 11x17 inch mat. Top section labeled 'START' with a circle outlining a place to put starting counters. Middle section labeled 'JOIN' with a + sign and an arrow pointing right. Right section labeled 'RESULT' with a circle for total counters and an = sign before it. Bottom: equation strip with three blanks '___ + ___ = ___'. Style: high-contrast colors (red, yellow, green zones), clear labels in 24-pt font.

Independent practice

5 min
Media
M-K-S-AT-05-C Audio Physical / non-image

30-second audio file. Adult voice reads each of the three story problems clearly and slowly with a 5-second pause between problems. Voice quality: warm, slow pace, deliberate emphasis on numbers and action words ('JOINED', 'ALTOGETHER'). Background: silent. Available at the listening center with headphones.

Formative assessment

2 min
Exit ticket
  • Story: 'There were 4 frogs on a log. 3 more frogs jumped on. How many frogs are on the log?' Draw the picture and write the equation.
  • Re-tell the story in your own words to your partner.
scoring Correct drawing AND equation AND retell = mastery; 2 of 3 = practicing; ≤1 = reteach

Closure

Moves
  • Math Detective close: 'Today we solved story problems where MORE was joined. The number grew. Tomorrow we explore: what happens when some are TAKEN AWAY?'

Homework

5 min
Tasks
  • Make up a Join story with a grown-up at home (use real things: spoons, socks, snacks). Tell the story and the answer. Bring the story to school to share.

Exercises in this lesson

math.gK.s.ex_12
Story: There are 6 fish in a bowl. 2 more fish are added. How many fish in the bowl? Build with counters.
 act out story · diff 2
math.gK.s.ex_13
Story: 4 dogs are at the park. 3 more dogs come. Draw the picture and write the equation.
 draw story · diff 2
math.gK.s.ex_14
Story: 5 birds in a tree. 4 more birds fly up. Write the addition equation.
 write equation for story · diff 3

Differentiation

Scaffolds
  • Pre-arranged counter sets on the story-mat for children new to building from scratch
  • Visual story cards (picture of the birds-in-tree scene) for read-along
  • Sentence-frame card for the retell
Extensions
  • Three-addend Join problems: 'There were 3 birds. 2 more came. Then 1 more came. How many altogether?' (3 + 2 + 1 = 6)
  • Make up your OWN Join story for a partner to solve.
English Learners
  • Bilingual story-problem cards
  • Picture-rich story problems with key vocabulary highlighted
  • Audio-recorded story read-aloud (loops as many times as needed)
Ieps 504s
  • Concrete-only response (act out or counters; no equation required)
  • One-step problems only (no three-addend stretch)
  • Story-problem mat with visual action arrows

Teacher notes

First CGI word-problem lesson of the unit. Today's problem type is Join Result Unknown — the easiest CGI type and the right entry point. Critical: ALWAYS have children re-tell the problem in their own words BEFORE solving. This is MP.1 'make sense of problems' in K-form. The re-tell prevents keyword-trapping (where children just see 'more' and add without understanding). Tomorrow (lesson 6) shifts to make-ten work; the next CGI lesson is lesson 8 (Separate Result Unknown). Today's stretch task — make-up-your-own-story — is the high-ceiling: when children create their own problems, they reveal their schema for what 'joining' looks like in the world.