Thinkabara

🧮 Math1st Grade

1st Grade Math: the year at a glance

12 units · 55 lessons · based on Common Core State Standards for Mathematics, Grade 1 — typical US scope & sequence. Every unit ends with a review & assessment day.

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Unit 1: Addition & subtraction within 10 1.OA.C.6

Add and subtract within 10 using objects, drawings and strategies · Use the commutative property (3 + 5 = 5 + 3)

  1. Counting on to add1.OA.C.5
  2. Turn-around facts1.OA.B.3
  3. Doubles1.OA.C.6
  4. Making 101.OA.C.6
  5. Subtract by counting back1.OA.C.5
  6. Fact families1.OA.B.4
  7. Review & assessment

Unit 2: Story problems within 20 1.OA.A.1

Solve add-to, take-from, put-together and compare problems · Represent problems with drawings and equations with a symbol for the unknown

  1. Add-to and take-from stories1.OA.A.1
  2. Put-together and take-apart1.OA.A.1
  3. Change unknown1.OA.A.1
  4. Compare problems1.OA.A.1
  5. Adding three numbers1.OA.A.2
  6. Review & assessment

Unit 3: Addition strategies within 20 1.OA.C.6

Add within 20 using counting on, make-a-ten and doubles plus one · Explain the strategy you used

  1. Make a ten to add1.OA.C.6
  2. Doubles plus one1.OA.C.6
  3. Choosing a strategy1.OA.C.6
  4. Addition facts to 20 fluency1.OA.C.6
  5. Missing addends1.OA.D.8
  6. Review & assessment

Unit 4: Subtraction strategies within 20 1.OA.B.4

Subtract within 20 using think-addition, counting back and making ten · Relate subtraction to addition

  1. Think addition to subtract1.OA.B.4
  2. Subtract by making ten1.OA.C.6
  3. Subtraction on a number line1.OA.C.5
  4. Subtraction story problems1.OA.A.1
  5. Subtraction facts fluency1.OA.C.6
  6. Review & assessment

Unit 5: The equal sign & true equations 1.OA.D.7

Understand that = means “the same as” · Decide whether equations are true or false

  1. What the equal sign means1.OA.D.7
  2. True or false?1.OA.D.7
  3. Unknowns in every place1.OA.D.8
  4. Equal sign games1.OA.D.7
  5. Review & assessment

Unit 6: Counting & place value to 120 1.NBT.A.1

Count, read and write numbers to 120 · Understand two-digit numbers as tens and ones

  1. Counting to 1201.NBT.A.1
  2. Groups of ten1.NBT.B.2a
  3. Tens and ones1.NBT.B.2
  4. Teen numbers and decade numbers1.NBT.B.2b
  5. Different ways to make a number1.NBT.B.2
  6. Review & assessment

Unit 7: Comparing two-digit numbers 1.NBT.B.3

Compare two-digit numbers using tens and ones · Record comparisons with >, = and <

  1. Compare with tens and ones1.NBT.B.3
  2. The symbols >, = and <1.NBT.B.3
  3. Ten more and ten less1.NBT.C.5
  4. Ordering numbers1.NBT.B.3
  5. Review & assessment

Unit 8: Adding & subtracting with tens 1.NBT.C.4

Add a two-digit number and a one-digit number or a multiple of 10 · Subtract multiples of 10

  1. Adding tens1.NBT.C.4
  2. Adding ones without regrouping1.NBT.C.4
  3. Making a new ten1.NBT.C.4
  4. Subtracting tens1.NBT.C.6
  5. Two-digit story problems1.NBT.C.4
  6. Review & assessment

Unit 9: Measuring length 1.MD.A.2

Order three objects by length · Measure length with same-size units, with no gaps or overlaps

  1. Order by length1.MD.A.1
  2. Measure with units1.MD.A.2
  3. Why same-size units?1.MD.A.2
  4. Measurement stories1.MD.A.2
  5. Review & assessment

Unit 10: Telling time 1.MD.B.3

Tell and write time in hours and half-hours on analog and digital clocks

  1. Parts of a clock1.MD.B.3
  2. Time to the hour1.MD.B.3
  3. Time to the half hour1.MD.B.3
  4. Our day in time1.MD.B.3
  5. Review & assessment

Unit 11: Data: tally, picture & bar graphs 1.MD.C.4

Organize and represent data with up to three categories · Answer how many in all and how many more questions

  1. Collect data with tallies1.MD.C.4
  2. Picture and bar graphs1.MD.C.4
  3. Ask questions about data1.MD.C.4
  4. Review & assessment

Unit 12: Shapes & equal parts 1.G.A.3

Tell defining from non-defining attributes of shapes · Compose shapes · Split circles and rectangles into halves and fourths

  1. Defining attributes1.G.A.1
  2. Compose 2D shapes1.G.A.2
  3. 3D shapes1.G.A.2
  4. Halves1.G.A.3
  5. Fourths1.G.A.3
  6. Review & assessment

Math in other grades

Kindergarten53 lessons1st Grade55 lessons2nd Grade53 lessons3rd Grade53 lessons4th Grade55 lessons5th Grade50 lessons6th Grade41 lessons7th Grade39 lessons8th Grade39 lessons