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## Back to Features

Core Disciplines

Here are the most popular resources this week:

Resource Views* Quick Launch
1 Simplifying Expressions Using Order of Operations 5,895 Try Now
2 Intersecting Parallel Lines: Perspective in Art 4,236 Try Now
3 Solving Simple Equations 3,455 Try Now
4 Parallel Lines: Special Angles 2,843 Try Now
5 Triangles: Interior and Exterior Angles 2,114 Try Now
6 Simplifying Polynomial Expressions 1,693 Try Now
7 Triangles: Proving Congruency 1,689 Try Now
8 Angles, Angles, and More Angles 1,537 Try Now
9 How to Solve Equations 1,492 Try Now
10 Graphing Linear Equations 1,398 Try Now
11 The Pros and Cons of the Measures of Central Tendency 1,396 Try Now
12 Solving Linear Inequalities 1,363 Try Now
13 Solving Quadratic Inequalities 1,253 Try Now
14 Rules for Simplifying Exponents 1,173 Try Now
15 Flash Cards: Integers 0 to 12 1,144 Try Now
16 Finding the Area of a Sector 1,011 Try Now
17 Solving Equations and Checking Your Work 917 Try Now
18 Flash Cards: Decimals 907 Try Now
19 Graphing on a Coordinate Plane 893 Try Now
20 Graphing Translations 885 Try Now
21 Simplifying Expressions by Factoring 883 Try Now
22 Simplifying Radical Expressions 794 Try Now
23 Pre-Algebra: Graphing Linear Equations 729 Try Now
24 Distance: 1, 2, and 3 Dimensions 706 Try Now
25 Polygons: Interior and Exterior Angles 693 Try Now
26 Graphing Linear Systems 658 Try Now
27 Parallel and Perpendicular Slopes 656 Try Now
28 Graphing Dilations 624 Try Now
29 Solving Absolute Value Equations 609 Try Now
30 Graphing Rotations 573 Try Now
31 Using 2D Figures to Understand 3D Solids 551 Try Now
32 Solving Linear Systems 550 Try Now
33 Properties of Quadrilaterals 532 Try Now
34 Simplifying Basic Matrices 526 Try Now
35 Real Number Hierarchy 517 Try Now
36 The Break-Even Point 501 Try Now
37 Area and Circumference of a Circle 500 Try Now
38 Evaluating Expressions 497 Try Now
39 Midpoint Formula 484 Try Now
40 Exploring Graphs of Linear Equations 480 Try Now
41 Adding and Subtracting Polynomials 476 Try Now
42 Graphing Systems of Linear Inequalities 470 Try Now
43 Comparing Translations, Reflections, and Rotations 468 Try Now
44 Simplifying Rational Expressions 463 Try Now
45 Solving Linear Equations 455 Try Now
46 Real-World Examples of Quadratic Functions 452 Try Now
47 Pythagorean Theorem 441 Try Now
48 CPCTC 427 Try Now
49 Going Around in Circles 414 Try Now
50 Graphing Reflections 410 Try Now
51 House Plans 410 Try Now
52 Area of Triangles and Quadrilaterals 407 Try Now
53 Similarity and Proportions 404 Try Now
54 Vertical and Horizontal Lines 402 Try Now
55 Parallel or Perpendicular? 389 Try Now
56 Latitude, Longitude, and the Cartesian Plane 388 Try Now
57 Graphing Quadratic Functions 382 Try Now
58 Scientific Calculator 377 Try Now
59 Slope 358 Try Now
60 Exploring Transformations 342 Try Now
61 Solving Quadratic Equations 333 Try Now
62 Exploring Graphs of Linear Systems 330 Try Now
63 Surface Area of Prisms and Cylinders 326 Try Now
64 Graphing Linear Inequalities 324 Try Now
65 Right Triangle Trigonometry 319 Try Now
66 From Words to Equations and Back Again 296 Try Now
67 Pairs and Primes 284 Try Now
68 Analyzing Box-and-Whisker Plots 281 Try Now
69 Proving Trigonometric Identities 273 Try Now
70 Sampling Methods and Bias 272 Try Now
71 Solving One- and Two-Variable Quadratic Inequalities 269 Try Now
72 Determining Perfect Numbers 250 Try Now
73 Solving and Graphing Inequalities 248 Try Now
74 Triangles: Proving Similarity 243 Try Now
75 Using Pascal's Triangle 242 Try Now
76 Simplified Radicals 237 Try Now
77 Exploring Graphs of Special Functions 237 Try Now
78 Modeling Polynomial Functions 228 Try Now
79 Two Methods for Graphing Linear Inequalities 225 Try Now
80 Exploring the Coordinate Plane 223 Try Now
81 Is This Number Exact or Approximate? Is It Accurate or Precise? 223 Try Now
82 Basic Probability 220 Try Now
83 Transforming Graphs of Sine and Cosine 216 Try Now
84 Understanding Polar Coordinates 208 Try Now
85 Distance Formula in Washington, DC 208 Try Now
86 Literary Uses of Points, Lines, and Planes 207 Try Now
87 Exploring Graphs of Polynomial Functions 201 Try Now
88 Probability Distribution and Its Use 199 Try Now
89 Volume: Prisms and Cylinders 198 Try Now
90 Home Run Derby 194 Try Now
91 Describing the Rate of Change of an Exponential Function 193 Try Now
92 Exploring Rates of Change 192 Try Now
93 Rules for Simplifying Rational Expressions 192 Try Now
94 More Than One Parallel Line? 190 Try Now
95 The MEAN-ing of the Standard Deviation 186 Try Now
96 Applications of Logarithms 182 Try Now
97 A Few Words on Factoring 181 Try Now
98 Beyond the Correlation Coefficient 180 Try Now
99 What Is Happening to My Absolute Value Parent? 180 Try Now
100 The Law of Sines and the Ambiguous Case 179 Try Now
101 Synthetic Division Calculator 176 Try Now
102 Quadratic Functions: Two for the Graph of One 176 Try Now
103 Powers and Roots: How They are Related 173 Try Now
104 Exploring Systems of Linear Inequalities 172 Try Now
105 Types of Symmetry 171 Try Now
106 Area and Perimeter of Similar Polygons 171 Try Now
107 Hyperbolas, Asymptotes, and Factoring 168 Try Now
108 Radical Equations and Extraneous Roots 167 Try Now
109 Exploring Graphs of Quadratic Functions 167 Try Now
110 Seeing is believing 167 Try Now
111 Slope of Handicap Ramps 166 Try Now
112 Exploring Graphs of Absolute Value Equations and Inequalities 162 Try Now
113 Predicting Earthquakes through Graphs 162 Try Now
114 Height of a Tree 157 Try Now
115 Circles: Chords, Secants, and Tangents 157 Try Now
116 Even and Odd Functions 157 Try Now
117 Graphing Absolute Value Equations and Inequalities 156 Try Now
118 De Moivre's Theorem and Powers of Complex Numbers 154 Try Now
119 Division by Zero 154 Try Now
120 Measures of Central Tendency 154 Try Now
121 Graphing Quadratic Inequalities 154 Try Now
122 Measuring the Diagonal of a Classroom 152 Try Now
123 Exploring Graphs of Piecewise Functions 151 Try Now
124 Four Points about Point 151 Try Now
125 Matrices and Systems 149 Try Now
126 Key Features of Rational Functions 148 Try Now
127 Cryptography 144 Try Now
128 The AIDS Epidemic 140 Try Now
129 Simplifying Expressions with Complex Numbers 139 Try Now
130 Factor Away! 135 Try Now
131 Similarity and Problem-Solving 133 Try Now
132 Matrices and Determinants 133 Try Now
133 Traffic Jam 132 Try Now
134 The Importance of the Remainder and Factor Theorems 132 Try Now
135 Animal Crackers 130 Try Now
136 Applications of Recursion 128 Try Now
137 Central and Inscribed Angles in Circles 128 Try Now
138 Systems of Linear and Nonlinear Equations 127 Try Now
139 Exploring Graphs of Quadratic Inequalities 126 Try Now
140 The Limit of a Sequence 123 Try Now
141 Discovering the Advantages and Disadvantages of Sigma Notation 123 Try Now
142 Solving Quadratic Equations with Complex Roots 122 Try Now
143 Understanding the Discriminant of a Quadratic Equation 122 Try Now
144 Garden Fences 119 Try Now
145 Relationships in Proportion 118 Try Now
146 Matrix Operations: Associative or Commutative? 117 Try Now
148 Exploring Variations 117 Try Now
149 Intensity of an Earthquake 117 Try Now
150 Lines in Multiple Environments 115 Try Now
151 Mean and Median: Are They Stable? 115 Try Now
152 Newton's Law of Cooling 114 Try Now
153 Classical Angle Constructions 114 Try Now
154 Lighthouses 113 Try Now
155 What's My Data Type? 112 Try Now
156 Exploring Graphs of Linear Inequalities 110 Try Now
157 Cryptography and Matrices 110 Try Now
158 Congruency in Transformations 110 Try Now
159 Polynomials and Perimeters 109 Try Now
160 Using Data to Make Good Decisions 109 Try Now
161 Domains of Composite Functions 109 Try Now
162 Producing Crunch Berries Cereal 108 Try Now
163 Triangle Conjectures 108 Try Now
164 Understanding the Domain of Inverse Trig Functions 108 Try Now
165 Real-world Quadratic 108 Try Now
166 Choosing the "Best" Statistic 107 Try Now
167 When Should Vegetables Be Planted in the Garden? 105 Try Now
168 Towers of Hanoi 105 Try Now
169 Statistics in the News: What to Believe? 104 Try Now
170 Probability Distribution of Throwing Two Dice 104 Try Now
171 Random Samples Using Surveys 102 Try Now
172 Line Graphs with Real-World Data 102 Try Now
173 Which Method Is Best? 100 Try Now
174 It's Your Move 100 Try Now
175 Paper Folding Triangles and Euler's Line 98 Try Now
176 Central Tendencies from Web Data 98 Try Now
177 Using Systems of Equations to Make Money 97 Try Now
178 Explorations in Logarithms 97 Try Now
179 Graphing Rational Functions 96 Try Now
180 Surface Area as an Art Form 96 Try Now
181 How Many Ways Can the Pythagorean Theorem Be Proven? 95 Try Now
182 How Wide Is a Football Field? 95 Try Now
183 Data Gathering with Independent and Dependent Variables 95 Try Now
184 Centroid of a Triangle 94 Try Now
185 A Polar Family Treasure 94 Try Now
186 Congruency and Similarity in Quilt Design 94 Try Now
187 A Three Point Circle 93 Try Now
188 In Search of Pi 93 Try Now
189 All Nets Are Not Created Equal 93 Try Now
190 Using Your Own Data 92 Try Now
191 Sentences, Words, and Reading Level 91 Try Now
192 The Best Use of Your Time 91 Try Now
193 Polynomial Patterns 90 Try Now
194 Zeros and End Behavior of Polynomial Functions 90 Try Now
195 Playing Jeopardy with the Roots of a Quadratic Equation 89 Try Now
196 Properties of Rational Functions 89 Try Now
197 Indirect Measure 89 Try Now
198 Analyzing and Presenting a Month's Collection of Data 89 Try Now
199 Complex Roots of Quadratic Equations 88 Try Now
200 Binomial Factoring vs. Binomial Expansion 88 Try Now
201 "Pick" a Formula 88 Try Now
202 Orbits and Julia Sets 88 Try Now
203 Counts vs. Percentages 88 Try Now
204 Your Town's Average Temperature and a Sine Curve 87 Try Now
205 Satellite Orbits 87 Try Now
206 Changing Data: Effects on Variability 87 Try Now
207 Discovering e 85 Try Now
208 Greek Division 84 Try Now
209 Relationship between Factors and Roots 83 Try Now
210 Decisions, Decisions 83 Try Now
211 Logarithms Function with pH 82 Try Now
212 How Much Daylight in an Average Day? 82 Try Now
213 Matching Correlation and Plot 82 Try Now
214 Does Your Inverse Function? 81 Try Now
215 Variability of World Leaders 81 Try Now
216 Combinations vs. Permutations 81 Try Now
217 Rational Scale Factors 80 Try Now
218 The Highs and Lows of a Quadratic Function 80 Try Now
219 Why Are Sine and Cosine Called Circular Functions? 80 Try Now
220 Finding a More General Area Formula 79 Try Now
221 Zeno's Paradoxes 79 Try Now
222 Solving Rational Inequalities 79 Try Now
223 Restriction of Domains 78 Try Now
224 Figurate Numbers 77 Try Now
225 Biorhythms and Sine Curves 77 Try Now
226 Relatively Speaking 76 Try Now
227 Fibo-Nature Numbers 76 Try Now
228 Monster Curves 74 Try Now
229 Rational Function Models: The Mo\$t for Your Dollar 74 Try Now
230 Building a Riemannian World 74 Try Now
231 Map-Matical Induction 73 Try Now
232 SierPascal's Triangle? 73 Try Now
233 Surface Area and Volume Relationships 73 Try Now
234 Infinitely Interesting Series 73 Try Now
235 Discovering the Period of a Pendulum 72 Try Now
236 Exploring Sequences 72 Try Now
237 Going to Extremes 71 Try Now
238 Approximating Sine and Cosine 71 Try Now
239 In Focus: Applications of Rational Functions 71 Try Now
240 Bisection Theorem 71 Try Now
241 Using a Trig Equation with the Nautical Mile 70 Try Now
242 Approximating π with Inverse Trigonometric Functions 70 Try Now
243 Conics in Polar Form 69 Try Now
244 Create Your Own Polar Curve 69 Try Now
245 Hyperbolic Analogies of Common Trigonometric Identities 69 Try Now
246 Classical Curves: Polar and Rectangular Graphs 68 Try Now
247 Appli-COMPLEX-cations 66 Try Now
248 Circular vs. Hyperbolic Trig Functions 65 Try Now
249 N x N Non-taking Rooks 62 Try Now

*Views represent combined teacher and student resource usage for the current academic year.