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1st Grade Math CurriculumUnit 9

These are the lesson plans for Unit 9 of 12 in the 1st Grade Math Curriculum: 127 lessons in teaching order, week by week, each with a lesson plan and an exit ticket.

Also for this unit: this unit’s exit tickets and this unit’s test. See the whole year

Resources for Each Lesson

Everything each lesson plan points to, with links. Sheet numbers count worksheets: a color pack prints each sheet again in black and white.

9.1 10 more and 10 less on a hundreds chart

9.2 10 more and 10 less in your head

9.3 Add and subtract tens

9.4 Add tens to any number

9.5 Add a one-digit number, no new ten

9.6 Add a one-digit number, making a new ten

9.7 Add with base-ten drawings

9.8 Add on a number line

9.9 Subtract tens by breaking apart

9.10 Story problems within 100

9.11 Hundreds chart puzzles

9.12 Explain how you added

Skills Covered

  • Find 10 more and 10 less on a chart and in your head
  • Add and subtract tens
  • Add tens to any number
  • Add a one-digit number, with or without a new ten
  • Add with base-ten drawings and on a number line
  • Take away tens by breaking a number apart
  • Solve story problems within 100
  • Hundreds chart puzzles and explaining how you added

How to Use This Pack

Twelve lesson plans, one for each lesson of a unit on adding and subtracting within 100, in teaching order, after an overview page that lays the unit out day by day: a pre-check, the twelve lessons, a review and the unit test. Each plan fits on one page. It gives the goal, what to get ready, the words to use, the lesson in five steps with the words to say, questions to ask, common mistakes and what to do about them, and the Animal Math worksheets, makers, tools and quiz for the lesson.

In the Classroom

Print the unit, or just the day's page, and teach from it. Each lesson takes about 45 minutes: a 5 minute warm up, 10 minutes of teaching, 10 minutes together, 15 minutes of practice and an exit ticket at the end. The exit tickets and the unit test are separate packs, made for these lessons. Subtraction in this unit only takes away tens (86 − 30), as 1st grade does; two-digit minus two-digit comes in 2nd grade.

At Home

Teaching at home? Use the warm up and the "Try it together" step as a short lesson, and the "Words to use" as the way to talk about it. Bundles of ten straws or craft sticks work as well as base-ten blocks. The mistakes to watch for are the ones most children make.

Tips for Success

  • Read the "Watch for" box before the lesson: it is what to listen for while students work
  • Keep base-ten blocks and a hundreds chart on the tables for the whole unit
  • Sort the exit tickets into got it, almost and not yet to plan the next day
  • Use the help and challenge ideas for small groups during practice

Common Core Standards Alignment

This pack supports the following Common Core State Standards for Mathematics:

  • 1.NBT.A.1 Count up to 120 from any starting number, and read, write and use numerals up to 120 to show how many objects.
  • 1.NBT.C.4 Find sums up to 100 (two-digit plus one-digit, or plus a multiple of 10) with models and place value, making a new ten when needed.
  • 1.NBT.C.5 Without counting, find the number 10 greater or 10 smaller than any two-digit number, doing it mentally and explaining why.
  • 1.NBT.C.6 Subtract one multiple of 10 from another (between 10 and 90, answer zero or more), such as 70 - 40, using models or place value.
  • 2.MD.B.6 Show whole numbers as distances from 0 on an evenly marked number line, and show sums and differences up to 100 as jumps on it.

© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

1st Grade Add and Subtract Within 100 Lesson Plans

Lesson plans for every lesson of a 1st grade unit on adding and subtracting within 100, one page a lesson, with a unit overview that lays the unit out day by day. Each plan has the goal and its "I can" line, what to get ready, the words to use, a 45 minute lesson in five steps (warm up, teach with words to say, try it together, practice, exit ticket), questions to ask, the mistakes students make and what to do about them, and ideas for students who need help or are ready for more. Each one ends with the Animal Math worksheets, worksheet makers, tools and quiz for that lesson. Lessons: 10 more and 10 less on the hundreds chart and in your head, adding and subtracting tens, adding tens to any number, adding a one-digit number with and without a new ten, adding with base-ten drawings and on a number line, taking away tens by breaking a number apart, story problems, hundreds chart puzzles and explaining how you added.

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What’s Included

  • 12 one-page lesson plans, one for each lesson of the unit
  • A unit overview: the unit day by day, what to get ready, how each lesson goes
  • Words to say, questions to ask and common mistakes for every lesson
  • The worksheets, makers, tools and quiz for each lesson (13 pages in all)
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