How this resource helps
Add & Subtract Within 20 is a complete Grade 1 mathematics lesson on fluent strategies within 20, built for projection and direct instruction. The lesson names the standard, sets the goal, and builds strategy vocabulary — count on, decompose, equivalent — before a warm-up and math talk. Students then watch I Do models of counting on, making ten, and decomposing to a ten, practice together in We Do, and apply strategies in 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.6. Suggested pacing: one 45–60 minute lesson, or split across two shorter sessions; local pacing varies.
What’s Included
- 30-slide editable PowerPoint (PPTX)
- Standard, goals, and essential question
- Strategy vocabulary: count on, decompose, equivalent
- Warm-up and math talk
- I Do / We Do modeled strategy 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 strategies, guided practice, partner tasks, exit ticket, and challenge.
Standard or objective
NC.1.OA.6 — Add and subtract, within 20, using strategies such as counting on, making ten, decomposing a number leading to a ten, using the relationship between addition and subtraction, and creating equivalent but easier or known sums. North Carolina Grade 1 Mathematics.