Curated OER
From Dust Grains to Dust Balls
In this formation of planets worksheet, students solve 6 problems including finding the equation for the mass of rocks as a function of time, finding the equation for the rate of growth of the mass of rocks and integrating these equations.
Balanced Assessment
Para-Ball-A
Analyze the flight of a thrown ball. Learners determine the maximum height of a thrown ball and the time it takes to hit the ground given its initial speed. They continue to review different scenarios with different maximums or different...
Curated OER
The Focus of an Ellipse
In this algebra instructional activity, students solve for the center of an ellipse by finding the focus. They use the focus formula when solve for conics. There are 13 problems with an answer key.
Curated OER
Equations of Lines Perpendicular and Parallel
In this algebra learning exercise, students solve linear equations using one and two steps. They solve systems of equations using substitution and elimination with graphing. There are links for ready made tests and quizzes.
Curated OER
Why do Stars Rise in the East?
In this stars rise in the east instructional activity, students use geometry to show how the Earth rotates from west to east and why celestial bodies appear to rise in the east and set in the west. Students draw a figure and label given...