California Education Partners
Photos
Why do all sizes of pictures not show the same thing? Class members analyze aspect ratios of various sizes of photos. They determine which sizes have equivalent ratios and figure out why some pictures need to be cropped to fit...
EngageNY
An Application of Linear Equations
Just how far will the Facebook post go? Lead a discussion on how to manipulate the sum of a geometric series to figure out a formula to find the sum at any step. The plan contains an alternative to the discussion with more...
North Clackamas Schools
Sorting Living and Nonliving Objects
Is a rock living? How about lima beans? You'll find everything you need for an interactive sorting activity exploring living and non-living things.
Curated OER
Reflection and Refraction
Life is only a reflection of what we allow ourselves to see. The lesson includes three experiments on light reflection, light refraction, projection, lenses, and optical systems. Each experiment builds off the ones before and...
Curated OER
Three Digit Addition
In this math worksheet, students solve three digit addition problems. Some of the addition problems require regrouping. The problems are set up to solve vertically.