Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: N q.a.3, N q.a.1, N q.a.2: Weed Killer

For Teachers 9th - 10th Standards
The principal purpose of the task is to explore a real-world application problem with algebra, working with units and maintaining reasonable levels of accuracy throughout. Aligns with N-Q.A.3, N-Q.A.1, and N-Q.A.2.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Sse Radius of a Cylinder

For Teachers 9th - 10th Standards
Given the height and volume of a certain cylinder, Jill uses the volume formula to compute its radius. If a second cylinder has the same volume as the first, but is 100 times taller, what is its radius? Aligns with A-SSE.A.1.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Sse Mixing Fertilizer

For Teachers 9th - 10th Standards
A landscaping company prepares two mixtures of fertilizer. In this task, students investigate what happens to the value of an expression when a quantity is changed. Aligns with A-SSE.A.1 and A-SSE.A.1.b.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Tf, G Co, Trigonometric Identities and Rigid Motions

For Teachers 9th - 10th Standards
The purpose of this task is to apply translations and reflections to the graphs of the functions f(x)=cos x and g(x)=sin x in order to derive some trigonometric identities. There are also rotations 180 degrees about points on the x-axis...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Apr Egyptian Fractions Ii

For Teachers 9th - 10th Standards
In this task, learners will rewrite fractions as a sum of distinct unit fractions. To solve the problem, students will rewrite a simple rational expression and will need to study the arithmetic of these unit fractions with a variable in...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Apr Zeroes and Factorization of a General Polynomial

For Teachers 9th - 10th Standards
In this task, students investigate the properties of a polynomial of degree d > 0. The task relates to the Fundamental Theorem of Algebra. Aligns with A-APR.B.2.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Apr Zeroes and Factorization of Quadratic Polynomial

For Teachers 9th - 10th Standards
This is the first of a series of problems building to an understanding of an important property of polynomial functions, that a polynomial of degree d can have at most d roots. Aligns with A-APR.B.2.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Sse Delivery Trucks

For Teachers 9th - 10th Standards
This task asks students to analyze four expressions to determine what each represents in terms of the problem's context, which is about two trucks delivering different amounts of sand in different numbers of trips. Aligns with A-SSE.A.1...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Sse the Bank Account

For Teachers 9th - 10th Standards
For this task, students are asked to interpret equations representing a bank account's balance where the interest is compounded monthly versus yearly. Aligns with A-SSE.A.1 and A-SSE.A.1.a.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Sse Mixing Candies

For Teachers 9th - 10th Standards
This task about a box of chocolates has students use the given equations to answer questions about weight and price, as well as interpret the expressions in the equations. Aligns with A-SSE.A.1 and A-SSE.A.1.a.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Which Is Heavier?

For Teachers K - 1st Standards
Students will learn the concept of weight by practicing weighing items on a balance scale and recording their results. Students can record their answers on the black line masters included in the Illustrated Mathematics lesson "How Heavy?".
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Comparing Numbers

For Teachers 1st - 2nd Standards
This task is a fun partner game in which students practice making two-digit numbers, decide which is greater, and write the appropriate comparison symbolically.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Origami Regular Octagon

For Teachers 9th - 10th Standards
After successive folds of a piece of origami paper, a student must explain why the shape made is a regular octagon. Aligns with G-CO.A.3 and G-CO.D.12.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co, G Srt Seven Circles I

For Teachers 9th - 10th Standards
In this task, seven pennies are placed in a circle so that they are all touching one in the center and their neighbors. The question is whether this will work with other equally-sized circles. Aligns with G-SRT.C and G-CO.C.10.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Properties of Congruent Triangles

For Teachers 9th - 10th Standards
The goal of this task is to understand how congruence of triangles, defined in terms of rigid motions, relates to the corresponding sides and angles of triangles. Aligns with G-CO.B.7.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C, G Co Tangent Lines and the Radius of a Circle

For Teachers 9th - 10th Standards
In this task, students are shown a circle with center O and point P on the circle. L is a line that is a tangent to the circle at P. They must show that line OP is perpendicular to line L. Aligns with G-C.A.2, G-CO.A, and G-CO.C.9.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Inscribing an Equilateral Triangle in a Circle

For Teachers 9th - 10th Standards
Suppose we are given a circle of radius r. The goal of this task is to construct an equilateral triangle whose three vertices lie on the circle. Aligns with G-CO.D.13.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Inscribing a Hexagon in a Circle

For Teachers 9th - 10th Standards
In this task, students inscribe a regular hexagon inside a circle and compare its area to that of the circle. Aligns with G-CO.D.13.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Building a Tile Pattern by Reflecting Octagons

For Teachers 9th - 10th Standards
This task applies reflections to a regular octagon to construct a pattern of four octagons enclosing a quadrilateral. The focus of the task is on using the properties of reflections to deduce that the quadrilateral is actually a square....
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Points Equidistant From Two Points in the Plane

For Teachers 9th - 10th Standards
In this task, students are shown a line segment that is bisected at a right angle by a second line. They are asked to prove statements about this geometric construction. Includes a GeoGebra worksheet that can be used by the instructor to...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Midpoints of Triangle Sides

For Teachers 9th - 10th Standards
The goal of this task is to use similarity transformations to relate two triangles. The triangles are obtained by taking midpoints of two sides of a given triangle. Aligns with HSG-CO.C.10.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Defining Perpendicular Lines

For Teachers 9th - 10th Standards
Three students have proposed three ways to describe when two lines are perpendicular. Students are asked to analyze their statements. Aligns with G-CO.A.1.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Midpoints of the Sides of a Paralellogram

For Teachers 9th - 10th Standards
Suppose that ABCD is a parallelogram and that M and N are the midpoints of lines AB and CD respectively. Students are asked to prove that MN=AD, and that the line MN is parallel to line AD. Aligns with G-CO.C.11.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Parallelograms and Translations

For Teachers 9th - 10th Standards
In this task, young scholars apply the definition of a parallelogram in the context of a geometric construction. Aligns with G-CO.C.11.

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