Illustrative Mathematics
Distance across the channel
Here you will find a model of a linear relationship between two quantities, the water depth of a channel and the distance across the channel at water level. The cross section of the channel is the shape of an isosceles trapezoid. The...
Los Angeles County Office of Education
Assessment for the California Mathematics Standards Grade 3
Assess scholars' knowledge with a 22-page assessment that covers place value, patterns, probability, estimation, measurement, geometric figures; and their ability to add, subtract, multiply and divide proficiently.
Curated OER
Symmetries of a Quadrilateral II
Learners investigate the symmetries of a convex quadrilateral in a collaborative activity. Rigid motion and complements are explored as learners analyze different cases of reflections across a line.
Oswego City School District
Regents Exam Prep Center: Study of Quadrilaterals
An interesting technique is used for student viewers to learn about quadrilaterals. A viewer can meet the quadrilateral family by clicking on a link and characters will introduce themselves and tell you about their distinguishing...
Oswego City School District
Regents Exam Prep Center: Quadrilateral Family
Regents Prep displays and explains the different types of quadrilaterals.