This short video and interactive assessment activity is designed to teach third graders about determining unknown angles in trapezoids.

This short video and interactive assessment activity is designed to teach fourth graders about determining unknown angles in trapezoids.

This short video and interactive assessment activity is designed to teach fifth graders about determining unknown angles within rectangles and squares.

This short video and interactive assessment activity is designed to teach third graders about determining unknown angles within rectangles and squares.

This short video and interactive assessment activity is designed to give fourth graders an overview of capacity - word problems.

This short video and interactive assessment activity is designed to give fifth graders an overview of capacity - word problems.

This short video and interactive assessment activity is designed to teach fifth graders about determining the elapsed time given start and end time.

This short video and interactive assessment activity is designed to teach fourth graders about determining the order of decimals in word problems.

This short video and interactive assessment activity is designed to teach fifth graders about determining the product of two decimals without calculation.

This short video and interactive assessment activity is designed to give fourth graders an overview of special triangles.

This short video and interactive assessment activity is designed to teach third graders about determining the unknown angle in an isosceles triangle.

In this deterministic cellular automata model, interactions between neighboring automata are described using a prisoner's dilemma. Limiting dispersal of seeds of annual plants can permit heterogeneous co-existence, whereas thorough mixing instead allows one subpopulation to dominate quickly.

Through this activity, students in a liberal arts mathematics class will develop experience with real-world statistical concepts through the context of sustainability: estimation, survey writing, sampling techniques, and data analysis.

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Determine the dew point temperature for your classroom through a hands-on experiment. Use humidity and temperature probes to investigate the temperature at which it would rain in your classroom! Learn about water density and the conditions necessary to produce fog or rain.

Students practice data collection by gathering data within the classroom on common causes of allergies. They examine and interpret data charts on national trends in allergies.

This task supports students in correctly writing numbers. Because students have to trace the number, instead of coloring in a bubble with the number in it or circling the correct number, they gain handwriting practice as well as counting and addition practice.

This short video and interactive assessment activity is designed to teach second graders about determining time changes in 5-minute intervals.

This short video and interactive assessment activity is designed to teach third graders about solving for beginning time in 5-minute intervals - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about ending time in 5-minute intervals - word problems.

This short video and interactive assessment activity is designed to give fourth graders an overview of subtraction (numbers to 1,000).