Illustrative Mathematics
Illustrative Mathematics: G Co Reflected Triangles
In this task, learners must use a straightedge and compass to construct the line across which one triangle was reflected onto another. Aligns with G-CO.A.5 and G-CO.D.12.
Illustrative Mathematics
Illustrative Mathematics: G Srt Sine and Cosine of Complementary Angles
The goal of this task is to provide a geometric explanation for the relationship between the sine and cosine of acute angles. In addition, young scholars will need to think about the sine and cosine as functions of an angle in order to...
Illustrative Mathematics
Illustrative Mathematics: G Srt Defining Trigonometric Ratios
The purpose of this task is to use the notion of similarity to define the sine and cosine of an acute angle. Aligns with G-SRT.C.6.
Illustrative Mathematics
Illustrative Mathematics: 1.oa Maria's Marbles
This lesson plans has students solve word problems about marbles using addition or subtraction within 20.
Illustrative Mathematics
Illustrative Mathematics: A rei.c.6: Accurately Weighing Pennies Ii
This illustrated math lesson shows how important levels of accuracy in measurement are. The answer can be different since a scale only accurately weighs to the nearest tenth of a gram instead of to the nearest hundredth of a gram. Aligns...
Illustrative Mathematics
Illustrative Mathematics: A Rei the Circle and the Line
Students are required to solve a system of equations in this task which will demonstrate their understanding of the correspondence between intersection points of the two graphs and solutions of the system. Aligns with A-REI.C.7.
Illustrative Mathematics
Illustrative Mathematics: A Rei Pythagorean Triples
This task has two separate goals: the first is to solve a pair of equations, one quadratic and the other linear. The second goal is to observe that a point that lies on a circle gives rise to a Pythagorean triple. Aligns with A-REI.C.7.
Illustrative Mathematics
Illustrative Mathematics: Explore the Standards
Explore standards by grade and category.
Illustrative Mathematics
Illustrative Mathematics: 4.g Defining Attributes of Rectangles & Parallelograms
At early stages of understanding of geometric shapes, 4th graders describe shapes, but do not yet characterize shapes by their properties. One example of a misconception students have at this stage is that a rectangle has two short sides...
Illustrative Mathematics
Illustrative Mathematics: A Cubic Identity
This task presents a challenging exercise in both algebraic manipulations and seeing structure in algebraic expressions (MP 7).
Illustrative Mathematics
Illustrative Mathematics: Complex Distance
This problem is intended to reinforce the geometric interpretation of distance between complex numbers and midpoints as modulus of the difference and average respectively.
Illustrative Mathematics
Illustrative Mathematics: What's Your Favorite Subject
This website provides a task in which students interpret data in a two way table by calculating the relative frequencies of a data set.