Classifying Triangles Geometry for Special Education PRINT and DIGITAL


Total Pages 169 pages plus 46 google slides
Answer Key Included
Teaching Duration 3 Weeks


This classifying triangles unit is part of a 6-part Geometry series and contains 169 pages and 46 google slides of material specifically designed for students with autism and special learning needs who are in middle and high school.


This unit addresses lots of information about triangles including equilateral, isosceles, scalene, acute, obtuse, and more in a simplified but rigorous way for students with diverse learning needs to make meaningful and authentic connections to the material.


There are MANY opportunities for students to engage in repeated information on these concepts.


Finally, many of the activities and assessments include more than one version, suggestions for differentiation, and options for presentation.



Save money and get this unit as part of my Geometry Bundle CLICK HERE


This unit includes digital versions of the activities. There are 64 google slides that include a differentiated set of slides. There is a movie version of the book included as well.




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Triangles Geometry Unit Includes:


⭐ This unit comes in 2 complete files. One is in color and one is in black and white.


In the zipped folder you will find:

  • 17 days of lesson plans
  • Triangles activities in color
  • Triangles activities in black and white
  • Voice-recorded PowerPoint show
  • All About Triangles book (PowerPoint) to use with activities
  • Links and directions to digital activities


Triangles Activities:


  • Hands-on activities
  • Vocabulary board
  • 16 Vocabulary cards and cut/paste activities (includes digital version)
  • Circle map (includes digital version)
  • Sorting activities (includes digital version)
  • Circle different types of triangles (includes digital version)
  • Matching triangles in different orientations (includes digital version)
  • Highlighting different parts of triangles
  • Finding congruent or similar triangles (includes digital version)
  • 3 close worksheets (includes digital version)
  • 2 Sudoku puzzles (includes digital version)
  • Assessments (3 versions) (includes digital version)



Much of what I have learned about curriculum development is incorporated in these units. For example, do not be afraid of repetition. It is critical that students with significant disabilities get to experience material over several days to be able to fully assimilate what is being taught. Also, adding visual supports to your printables and class activities helps students be able to pay more attention to the content you are presenting rather than the mechanics of what is expected. Finally, ask questions. Good questions!! Regardless of the material, if we can ask students good questions it will push them to think more deeply than before.