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Chapter 4

Lesson 1: Two digit fact families

   Fact family video

   Extra Practice: Worksheet 1

                           Worksheet 2

Lesson 2: Take apart 10s to subract

   In order to understand this concept it is important that the students understand expanded form

   Expanded form video

   Take apart 10s to subtract video

    Extra Practice; Worksheet 1

                            Worksheet 2

Lesson 3: Regroup tens as ones

    Regroup tens as ones video

     Extra Practice: Worksheet 1

                             Worksheet 2

Lesson 4: Subtract from a two digit number

    Subtract from a two digit number video

     Extra Practice: Worksheet 1

                             Worksheet 2

Lesson 5: Subract two digit numbers

    Subtract two digit numbers video

     Extra Practice: Worksheet 1

                             Worksheet 2

Lesson 6: Rewrite two digit subtraction problems

       Extra Practice: Worksheet 1

                              Worksheet 2

Lesson 7: Check subtraction

    Check subraction video

     Extra Practice: Worksheet 1

                             Worksheet 2

Lesson 8 Problem solving strategy: Write a number sentence

    Write a number sentence video

     Extra Practice: Worksheet 1

                             Worksheet 2

Lesson 9: Two step word problems