Curated OER
Prime Numbers and Factors
Solving factor trees is a helpful way to introduce prime numbers. Your math class practices using this method along with two-column tables to find if a number is prime or not. They also learn other vocabulary, such as composite numbers,...
Alabama Learning Exchange
How Old Is That Tree?
Fifth graders study environmental changes by examining the annual rings of a cross-section of a tree trunk. They access websites to complete a worksheet on the parts of a tree. They count the annual rings on a tree slice while observing...
Curated OER
Extraordinary Extrapolation
Learners study how scientists have estimated the maximum height to which trees can grow, and assess the reliability of interpolation and extrapolation techniques by making predictions with particular data sets and analyzing accuracy of...
Curated OER
Lesson: Journey of a Tree
Third graders explore the operation of a Christmas farm and how trees are shipped. After taking a tour of a Christmas tree farm and researching transportation, location and cost issues, 3rd graders create a map to show the distribution...
Curated OER
Guetemala's Changing Forest
Eighth graders compare their local ecological zone to the tropical rainforest. In this natural ecology lesson, 8th graders complete an activity about the differences in ecological zones. They compare their biome to the Guatemalan...