Doug Doblar
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Geometry Strand

The sequence of lessons below are for the 6th grade Geometry strand, paced for Georgia 6th-accelerated, which is closely aligned to the Common Core.
Click here to view this strand as a YouTube playlist

"Rectangle Wrap-Around"

This is an activity from the Georgia Math Frameworks that I use to open this unit.
Finding the Area of Right Triangles and Parallelograms
1_-_finding_the_area_of_right_triangles_and_parallelograms.pdf
File Size: 962 kb
File Type: pdf
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Area Formulas for Right Triangles and Parallelograms
2_-_area_formulas_for_right_triangles_and_parallelograms.pdf
File Size: 695 kb
File Type: pdf
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Finding the Area of Non-Right Triangles
3_-_finding_the_area_of_non-right_triangles.pdf
File Size: 520 kb
File Type: pdf
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Area of Trapezoids
4_-_area_of_trapzoids.pdf
File Size: 356 kb
File Type: pdf
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Area of Compound Figures
5_-_area_of_compound_figures.pdf
File Size: 275 kb
File Type: pdf
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Net Investigation and Vocabulary
I lead students through an investigation involving the nets of 3-D figures using physical manipulatives and introduce the vocabulary of the different types of prisms and pyramids.
Representing and Finding Surface Area
7_-_surface_area.pdf
File Size: 720 kb
File Type: pdf
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What is volume?
For students who weren't exposed to or don't understand the concept of volume from 5th grade, I recommend a hands-on refresher investigation.
Deriving the Volume Formula
9_-_deriving_the_volume_formula.pdf
File Size: 473 kb
File Type: pdf
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Finding the Volume of Rectangular Prisms with Fractional Side Lengths
10_-_finding_volume_of_prisms_with_fractional_side_lengths.pdf
File Size: 644 kb
File Type: pdf
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Special Volume Formula for Cubes
11_-_special_volume_formula_for_cubes.pdf
File Size: 388 kb
File Type: pdf
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What If the Cubes I Use to "Pack" a Figure Are Smaller Than One Cubic Unit?
12_-_what_if_the_cubes_i_use_to_pack_a_prism_are_smaller_than_one_cubic_unit.pdf
File Size: 533 kb
File Type: pdf
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What If the Cubes I Use to "Pack" a Figure Are Larger Than One Cubic Unit?
13_-_volume_involving_packing_cubes_larger_than_one_cubic_unit.pdf
File Size: 551 kb
File Type: pdf
Download File

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  • Home
  • Math Videos
    • 4th Grade Math >
      • Numbers - Base 10
      • Operations and Algebraic Thinking
      • Numbers - Fractions
      • Geometry
      • Measurement and Data
    • 6th Grade Math >
      • Number System (6th)
      • Ratios and Proportional Thinking (6th)
      • Expressions and Equations (6th)
      • Geometry (6th)
      • Statistics and Probability (6th)
    • 7th Grade Math >
      • Ratios-Rates-Proportions-7th
      • Expressions and Equations (7th)
      • Number System (7th)
      • Geometry (7th)
      • Statistics and Probability (7th)
    • 8th Grade Math >
      • Number System (8th)
      • Expressions and Equations (8th)
      • Functions (8th)
      • Geometry (8th)
      • Statistics and Probability (8th)
  • Blog Topics
    • Thinking Classroom
    • Leaning Into Science and Engineering
    • Classroom Practices
    • Classroom Stories
    • Ideas and Opinions
    • Pandemic-Related Issues
  • About
  • Now