How this resource helps
The Missing Number is a complete Grade 1 mathematics lesson on unknown addends within 20, built for projection and direct instruction. The lesson opens with a warm-up on making ten, defines the vocabulary students need (addends, sum, unknown, equation), and models I Do examples where students find a missing part using ten-frames, counters, and a number line. We Do guided practice builds confidence before students move to partner tasks and independent practice, finishing with an exit ticket and an early-finisher challenge. Every slide carries complete speaker-note guidance — the answer, the questioning moves, and what to listen for — so the lesson is ready to teach the first time. Aligned to North Carolina Grade 1 Mathematics Standard NC.1.OA.4. Suggested pacing: one 45–60 minute lesson, or split across two shorter sessions; local pacing varies.
What’s Included
- 30-slide editable PowerPoint (PPTX)
- Lesson goal, essential question, and vocabulary
- Warm-up: how many more make 10
- I Do modeled examples with ten-frames and counters
- We Do guided practice
- Partner tasks and independent practice slides
- Exit ticket and early-finisher challenge
- Complete speaker-note teacher guidance on every slide
- Single-teacher classroom license
Resource details
- Grade / course
- Grade 1 • North Carolina
- Subject and resource type
- Mathematics · Editable PowerPoint lesson
- Files
- 0 main PDF pages · 30 editable slides · PPTX
- Estimated completion time
- One 45–60 minute lesson, or two shorter sessions
- Answer key
- Yes. Worked answers, sample student responses, and questioning guidance appear in the speaker notes of every slide, including the warm-up, modeled examples, guided practice, partner tasks, exit ticket, and challenge.
Standard or objective
NC.1.OA.4 — Solve an unknown-addend problem, within 20, by using addition strategies and/or changing it to a subtraction problem. North Carolina Grade 1 Mathematics.