High School Resource Definition of a Locus by Math Open Reference This resource illustrates the concept of locus. The page shows a model of the plane populated with a large number of points on a grid. Those points equidistant from a point are highlighted forming a circle. The user can drag the point and drag […]

Middle School Resource Protractor by Math Open Reference This web page allows students to learn about protractors and how they are mathematically used. Related NY State Academic Standards: 4.MD.5.a, 4.MD.5.b, 4.MD.6, and more! Be sure to check out our Educational Resources, featuring thousands of activities, lesson plans, constructed-response questions, rubrics, teacher resources, multimedia, and more!

Elementary School Resource Line Segments by Math Open Reference This web-based resource is an interactive web page that demonstrates the definition of a line segment. The page presents two points and a line that links them. As the points are dragged, the line moves accordingly. (See also the tutorials for line and ray.) The page […]

High School Resource Classroom Idea: Quadratic Rocket Physics Physicists tell us that the altitude h in feet of a projectile t seconds after firing is h = -16t2 + vut + ho where vu is the upward component of its initial velocity in feet per second and h o is the altitude in feet from […]

Middle School Resource Classroom Idea: Understanding Equivalents In this activity, students are given a grid that is 10 x 10, instructed that the grid contains 100 squares and that the entire grid is equivalent to one with each square equivalent to 1/100 or 0.01 or 1%. Students are given a series of fractions in groups […]

Elementary School Resource Classroom Idea: Situational Ratios In this classroom idea, use pattern blocks such as a green triangle, blue rhombus, red trapezoid, and yellow hexagon, and have students discover the quantity of triangles needed to cover the blue rhombus, the red trapezoid, and the yellow hexagon. Related NY State Academic Standards: 1.MD.2, 1.G.1, MST3.1.PS.8, […]

High School Resource Fraction Matcher by PhET This simulation will allow students to match shapes and numbers to earn stars in this fractions game. Students can challenge themselves on any level they’d like. Try to collect lots of stars! Using the simulation, students will: Find matching fractions using numbers and pictures Make the same fractions […]

Middle School Resource Classroom Idea: Exploring Fractions with Pattern Blocks Activity: Using pattern blocks, students can discover the relationship between multiplication and division of common fractions by noting that 1/3 x 1/2 is equivalent to 1/3 ÷ 2. Using the commutative property, 1/3 x 1/2 = 1/2 x 1/3 or 1/2 of 1/3. If a […]

Middle School Resource Classroom Idea: Consuming Milk In this activity, write an equation for the number of gallons of milk for any given number of students in the following situation: Two out of every three students who eat in the cafeteria drink a half-pint of white milk. If 450 students eat in the cafeteria, how […]

Elementary School Resource Classroom Idea: Graphing Favorite Books In this activity, let students bring their favorite books to class and show them to each other. Have them discuss ways in which the books are similar or different. Have them choose one category of difference and sort the books on those categories. The books can be […]