Kindergarten Spring Math — Compose/Decompose to 10, Addition & Subtraction within 10, Teen Numbers as Ten-and-Ones, Measurement, and Classification
Lesson 19 30 min math.gK.s.lesson_19

Spring Math Portfolio — Show What You Know (Performance Assessment, Day 1)

Skills targeted
Objectives
  • Students demonstrate decomposition of 10 in at least three ways.
  • Students solve at least one CGI word problem (any of four types) and write the matching equation.
  • Students show the ten-and-ones structure of a teen number (e.g., 14 = 10 + 4).
Vocabulary
portfolioshowdemonstrateassessment

Lesson plan

Warm-up

3 min

'Today is a SHOW-WHAT-YOU-KNOW day. You will use your detective skills — number bonds, equations, ten-frames — to show what you have learned this spring. Take your time. You can use your counters and rekenrek to help.'

Teacher moves
  • Reduce assessment anxiety: 'There are no surprise questions. Everything is something we have done.'
  • Hand out packets

Direct instruction

5 min

Walk through each assessment task once: (1) Decompose 10 in three ways using the number bond or part-part-whole bar. (2) Solve the word problem: 'There are 4 frogs on a lily pad. 3 more jump on. How many in all?' — show with picture AND equation. (3) Show 14 on a double ten-frame and complete the equation 14 = 10 + ___. 'You can ask me if you don't understand the question — but you have to do the math yourself.'

Key examples
  • Look at this page. What do you have to do? (Listen for 'find three ways to make 10'.)
    model (Show the page; do NOT solve.)
    prompt Sample first page review
Checks for understanding
  • Do you understand the first task? (Affirm or clarify.)
  • Any questions before we start?

Guided practice

20 min
Tasks
  • Independent work on the assessment packet (3 pages, untimed but typically 20 minutes). Counters, rekenrek, double ten-frame, and number-bond mats available at each child's desk.
    scaffold Read-aloud available on request; manipulative use encouraged; no whole-class instruction during assessment time.
Media
M-K-S-AS-19-A Interactive Physical / non-image

11x14 inch assessment page. Top header: 'WAYS TO MAKE 10'. Three blank number-bond templates (whole circle on top labeled 10, two part-circles below empty). Child fills in three different decompositions. Below: an optional ten-frame for each (laminated for dry-erase). Sentence frame at bottom: 'I found ___ ways to make 10.' Font 24-pt, large clear lines. Style: clean test paper.

M-K-S-AS-19-B Interactive Physical / non-image

11x14 inch page. Top: a small illustration of 4 green frogs on a lily pad with 3 more frogs approaching (Join Result Unknown). Story text: 'There are 4 frogs on a lily pad. 3 more frogs jump onto the lily pad. How many frogs are on the lily pad?' Below: a blank space labeled 'My Picture' (large drawing space). Below that: equation strip '___ + ___ = ___'. Sentence frame: 'There are ___ frogs in all.' Style: warm watercolor illustration top, clean lines below.

M-K-S-AS-19-C Interactive Physical / non-image

11x14 inch page. Top: large numeral '14' in 60-pt font. Below: a blank double ten-frame (two adjacent 5x2 grids) for child to fill. Below that: equation '14 = 10 + ___' with the blank to fill in. Sentence frame: '14 is one ten and ___ ones.' Style: clean test paper, large clear grids.

Formative assessment

2 min
Exit ticket
  • Self-reflection sheet: rate your work today on (a) Decompose 10, (b) Word Problem, (c) Teen Number. Use one of three faces: smile (got it), neutral (working on it), thoughtful (need more practice).
  • Tell your partner: what's one thing you did really well today?
scoring Self-reflection completion = engagement indicator; teacher uses portfolio work for skill-level mastery scoring against rubric

Closure

Moves
  • Math Detective close: 'You are real mathematicians now. Tomorrow we finish — measurement, classification, shape composition show-what-you-know!'

Homework

Tasks
  • (No homework on assessment day.) Optional: tell a grown-up at home one thing you showed in math today.

Differentiation

Scaffolds
  • Manipulatives at every desk
  • Sentence frames on each task
  • Read-aloud on demand
  • Extended time (untimed)
Extensions
  • Stretch tasks at the back of the packet: 'Find ALL six pairs that make 10' / 'Solve a three-addend problem'
  • Build a teen number 18 OR 19 on the double ten-frame
English Learners
  • Bilingual versions of each task
  • Picture-supported word problem
  • Audio read-aloud
Ieps 504s
  • Concrete-only response acceptable for any task
  • Reduced number of tasks if accommodation specifies
  • Read-aloud always available
  • Quiet testing area

Teacher notes

Portfolio assessment Day 1 of 2. Today's three tasks (decompose 10, CGI word problem, teen-number place value) sample the unit's NUMBER and AT strand mastery. Tomorrow (lesson 20) covers measurement, classification, and shape composition. Untimed. Manipulatives available — this is K, not a high-stakes test. Self-reflection sheet at end is the assessment-as-learning component — children evaluate their own work. Use the rubric in the assessments section below to score each portfolio; provide families with individualized mastery snapshots at end of unit.