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Problems of the Month: Tri- Triangles

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These algebra problems of the month are designed to be used schoolwide to promote a problem-solving theme at your school. Each problem is divided into five levels, Level A through Level E, to allow access and scaffolding for the students into different aspects of the problem and to stretch students to go deeper into mathematical complexity.
Lower Primary, Upper Primary, Middle School, High School
Kindergarten, Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, Grade 11, Grade 12
Material Type:
Noyce Foundation
Provider Set:
Inside Mathematics
Date Added:
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Creative Commons Attribution-NonCommercial-NoDerivs 3.0
Media Format:
Downloadable docs


VS HIDOE on Aug 17, 10:29pm

I love these "Problem of the Month" tasks! These problems come as a "related set" of problems that can be used to differentiate (for varying levels of students). You could still give these problems as a whole class, starting with the Level A problem and progressing as far as may be appropriate for your students. So although I pulled it in grade 4 (Level B aligns to 4.OA.C5) it could also be applied to other grade levels. The Level A problem just has students building a triangle using toothpicks, and recording the pattern, continuing to 3 triangles (grade 3 level). Level B uses triangle pattern blocks to create a "table" using 1 triangle and keeping track of the pattern of the edges of the table, then putting 2 triangle tables together... As you connect the pattern to a rule, the level bumps up to grade 5, 6... In this packet of problems, I especially found the alignment/commentary at the end the most helpful. There is even a "script" to help teachers guide the discussion. The problem is open ended, the only thing this packet lacks is an answer key!



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