Trillions of Trees

Trillions of Trees

Trillions of Trees (Activities)   $5.99 Add to cart

Project Learning Tree is an award-winning environmental education program designed for teachers and other educators, parents, and community leaders working with youth from preschool through grade 12.

PLT’s Trillions of Trees features three PLT activities from PLT’s new Explore Your Environment: K-8 Activity Guide.

Trillion of Trees: Grades 3-5 Activities

Trillion of Trees is a downloadable, password protected PDF for educators of students in grades 3-5 that invites young learners to investigate the unique characteristics of different tree species and how best to plan, plant, and care for trees in their community.

Designed to be flexible, the activities can be used as stand-alone lessons, or all together as a cohesive unit of instruction using a storyline technique.


1. Tree ID

Students learn about the identifying features of trees, including their leaves, bark, twigs, flowers, fruit, and seeds.

2. Trees in Trouble

Students examine trees for signs of damage or poor health and investigate conditions for maintaining trees and other plants.

3. Plant a Tree

Students plan and carry out their own tree-planting project.


  • Multidisciplinary activities integrate core discipline areas, including STEM subjects, reading, writing, and social studies.
  • Hands-on activities connect children to nature in the city and the outdoors.
  • How to think, not what to think. Activities are designed to develop students’ critical thinking, problem-solving, and decision-making skills.
  • Background information, suggestions for enrichment, and student assessment tools for teachers.
  • Copyright-free Student Pages, or worksheets, can be easily loaded to Google Classroom.
  • Activities are practical, adaptable, and flexible. They are easy to do, require minimal preparation; no special supplies are needed.
  • Explicit connections to academic standards for science, English language arts, and social studies.
  • New supporting features include “Differentiated Instruction” techniques, “Take It Outside!”, “Did You Know?” forest facts, plus a “Career Corner” within each Student Page introduces youth to forest-related careers.

Each PLT activity displays explicit connections to practices and concepts mandated by academic standards. Below is an example from “Trees In Trouble.” Detailed standards correlations are available at


About PLT’s Activity Collections

Trillions of Trees is one in a series of PLT activity collections. Other titles in this themed series for educators are Sensational Trees for grades K-2, Biodiversity Blitz for grades 3-5 and Discover Your Urban Forest for grades 6-8. PLT’s practical, hands-on activities for teachers and nonformal educators, youth group leaders and home schoolers connect youth to nature and the outdoors. Each activity includes background information, preparation instructions, material and time requirements, step-by-step instructions, and assessment suggestions. Our fun and multi-disciplinary activities appeal to a broad range of learners, including students with diverse learning styles and cultural backgrounds. The activities incorporate STEM, reading, writing, and social studies, and teach students how to think, not what to think about environmental issues for developing students’ critical thinking and problem-solving skills.


PLT Professional Development

Did you know? PLT also offers online, blended, and in-person professional development tailored for specific grade levels, academic standards, environmental topics, and formal and nonformal teaching situations. Consistently rated as one of the best professional development events they have ever experienced, most educators attend a PLT training because they were recommended to it by a colleague. Learn more at

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