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Lesson Plan
Willow Tree

Interior Angles, Exterior Angles, and Diagonals of Polygons

For Students 8th - 11th Standards
How does the number of sides of a polygon affect the angle measures? Learners recognize a pattern in finding the total measure of interior and exterior angles and the number of diagonals. They use the patterns to calculate the number of...
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Worksheet
Curated OER

Hands-On: Sums of Angle Measures

For Students 5th - 8th
In this angle measures activity, students solve six word problems where they are given 6 different polygons, some of which are complex, and must determine angle measures in order to arrive at a solution.
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Lesson Plan
Curated OER

Polygons and Diagonals

For Teachers 6th - 9th
Students practice measuring the interior angles of given regular polygons and create a formula for finding the measure of th interior angles of any polygon. They determine the relationships between the number of vertices's or sides in a...
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Worksheet
Curated OER

Magic Squares

For Students 2nd - 4th
In this magic squares instructional activity, students add up the sum of the rows, columns, and diagonals to see if they are all the same and write the magic number. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
In this magic squares worksheet, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic squares

For Students 3rd - 4th
In this magic squares activity, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
In this magic squares worksheet, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
In this magic squares worksheet, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Worksheet
Curated OER

Magic Squares

For Students 3rd - 4th
In this magic squares activity, students add up the sums of the rows, columns, and diagonals and they all have to be the same. Students complete 4 magic squares.
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Lesson Plan
Curated OER

Finding The Sum of an Infinite Series

For Teachers 9th - 12th
Pupils examine finding the sum of an infinite series as the limit of partial sums. Through hands-on activities, students create their own sequence by finding the area of a square and then cutting it in half-sized pieces. They write out...
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Worksheet
Curated OER

Fractions and Rationals

For Students 5th - 8th
Upper elementary and middle schoolers solve 16 types of problems to include writing fractions to represent shaded portions, writing a mixed number to represent certain points on a number line, and changing equivalent mixed numbers to...
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Worksheet
Curated OER

Properties and Attributes of Polygons

For Students 10th
In this geometry worksheet, 10th graders determine if a polygon is convex or concave and apply the polygon Angle sum theorem and the polygon exterior angle sum theorem to determine the measures of interior and exterior angles of a...
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Lesson Plan
Curated OER

Geometry Journal: Isosceles Triangles

For Teachers 10th - 12th
In this isosceles triangles worksheet, students justify and determine the symmetry of an isosceles triangle. They explore the bisector of rectangles. This three-page worksheet contains two problems. Answers are listed on page three.
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Lesson Plan
Curated OER

A Fibonacci Primer

For Teachers 7th - 10th
Upper graders explore the Fibonacci sequence. They examine the characteristics of the Fibonacci sequence, list the properties of the sequence and determine how it connects to Pythagorean Triples. Related thinking questions are included.
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Worksheet
Curated OER

Magic Squares

For Students 4th - 8th
For this magic squares worksheet, learners complete each magic square where each row, column, and diagonal have to be the same sum. Students complete 6 magic squares.
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Worksheet
Curated OER

Number Search Y4: Make 12

For Students 3rd - 5th
In this number search worksheet, students find and highlight at least 12 addition, subtraction, multiplication and/or division math problems that make the sum of 12.
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Lesson Plan
Improving Measurement and Geometry in Elementary Schools

The Sum of the Interior Angles of a Polygon

For Teachers 4th - 5th Standards
Junior geometers discover that polygons can be decomposed into triangles and that the number of triangles can be determined by a rule. Note that the Geometer’s Sketchpad® software is required to carry out all components of this lesson. 
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Lesson Plan
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Curated OER

A Rectangle in the Coordinate Plane

For Teachers 7th - 9th Standards
A quadrilateral is drawn on the coordinate plane, and eighth grade geometers find the length of each side and the diagonals by applying the Pythagorean theorem. 
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Lesson Plan
Curated OER

Visualizing Vectors

For Teachers 9th - 12th Standards
Investigate vectors in standard positions and use the CellSheet application on the TI calculator to find the sum of two vectors. Convert from polar to rectangular coordinates and vice versa, and show graphs of the vectors.
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Worksheet
Curated OER

Magic Squares Vocabulary: Catcher in the Rye

For Students 10th - 12th
Magic squares make learning fun! Seriously! Learners use the given square to review vocabulary terms from J.D. Salinger's Catcher in the Rye. The 16 vocabulary terms are not divided by chapter, they represent the whole book. As learners...
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Worksheet
Curated OER

Things Fall Apart: Vocabulary

For Students 9th - 12th
What is a magic vocabulary square? Use this newly popular method of reviewing vocabulary to engage your class. There's some tricky vocabulary in Things Fall Apart; front-load words like impending, impudent, and pacified to ease the...
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Worksheet
Curated OER

Magic Squares

For Students 1st - 2nd
In this addition worksheet, students complete 4 magic squares in which the sums of the rows, columns and diagonals must be the same. Students analyze the filled-in squares and calculate the sum or the magic number.
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Worksheet
Curated OER

Number Search Y6 Make 24

For Students 4th - 6th
In this number search worksheet, students find the sums in the number search that equal 24 and circle them. They can be multiplication, addition, subtraction, and division. They then write the sums in the space at the bottom of the page....
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Worksheet
Curated OER

Angles

For Students 6th - 8th
In this math learning exercise, students measure a series of angles. Then they measure the angles in the triangles and determine the sum of the angles.