This short video and interactive assessment activity is designed to teach first graders an overview of subtraction (numbers to 100).
This short video and interactive assessment activity is designed to teach second graders an overview of telling time to 1-minute intervals.
This short video and interactive assessment activity is designed to teach first graders an overview of telling time to quarter and hour.
This short video and interactive assessment activity is designed to give fourth graders an overview of - tenths.
This short video and interactive assessment activity is designed to teach third graders about fraction of a whole.
This short video and interactive assessment activity is designed to teach second graders about fractions of a whole.
This short video and interactive assessment activity is designed to teach third graders about division patterns within the multiplication table.
This short video and interactive assessment activity is designed to teach fourth graders about patterns in division by 6, 7, 8, 9, 11, 12.
This short video and interactive assessment activity is designed to teach third graders about perimeter in grid.
This short video and interactive assessment activity is designed to teach third graders about perimeter of squares and rectangles.
This short video and interactive assessment activity is designed to teach second graders an overview of perimeter.
This interactive Flash animation allows students to explore size estimation in one, two and three dimensions. Multiple levels of difficulty allow for progressive skill improvement. In the simplest level, users estimate the number of small line segments that can fit into a larger line segment. Intermediate and advanced levels offer feature games that explore area of rectangles and circles, and volume of spheres and cubes. Related lesson plans and student guides are available for middle school and high school classroom instruction. Editor's Note: When the linear dimensions of an object change by some factor, its area and volume change disproportionately: area in proportion to the square of the factor and volume in proportion to its cube. This concept is the subject of entrenched misconception among many adults. This game-like simulation allows kids to use spatial reasoning, rather than formulas, to construct geometric sense of area and volume. This is part of a larger collection developed by the Physics Education Technology project (PhET).
An Interactive Course on Mandarin Chinese Pronunciation.
Pitch Perfect Pinyin is a two-part interactive website for learning Pinyin pronunciation.
This short video and interactive assessment activity is designed to teach fourth graders about four operations - missing operation.
This short video and interactive assessment activity is designed to teach fifth graders about adding, subtracting, multiplying and dividing - missing operation.
This short video and interactive assessment activity is designed to teach fourth graders about adding, subtracting, and multiplying with parentheses - missing operation.
This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting with parentheses ii.
This short video and interactive assessment activity is designed to teach fifth graders about placing the missing parentheses to make the equation true.
This short video and interactive assessment activity is designed to teach fourth graders about placing the missing parentheses to make the equation true.
This short video and interactive assessment activity is designed to teach second graders an overview - thousandths.