Order Now Free Trial

About Science A-Z

Resources
- Instructional Units
- Life
  GRADES K-2
  GRADES 3-4
  GRADES 5-6
- Earth & Space
  GRADES K-2
  GRADES 3-4
  GRADES 5-6
- Physical
  GRADES K-2
  - Doing Work
  - Energy
  - Light
  - Properties
  - Magnets
  - Things Move
  GRADES 3-4
  GRADES 5-6
- Process
  GRADES K-2 Tools
  Skills
  GRADES 3-4 Tools
  Skills
  GRADES 5-6 Tools
  Skills
- Resource Types
- Science & Literacy
  Books
  Additional Reading
  Comprehension Supports
  Vocabulary
  Assignable Digital Resources
- Activities
  Hands-On Activities
  - Process Activities
  - Science Fair Resources
  Scientific Argumentation
  - Debates
  Project-Based Learning
  - New Project-Based Learning Packs
  Multimedia
  - Science Videos
  Assignable Digital Resources
- NewNGSS
  Grade K
  Grade 1
  Grade 2
  Grade 3
  Grade 4
  Grade 5
  Grades K-2 Engineering
  - Engineering Design
  Grades 3-5 Engineering
  - Engineering Design
  Middle School Resources

Manage Students
Manage science activity and growth
- View your entire roster.
- Make assignments.
- Track progress with reports.
- Review what's in your In Basket.
Teacher Corner
Technology
Curriculum Correlations
Learning A-Z Levels
- Science A-Z Reading Levels
Helpful Tools

Kids Login

Reading Levels These books contain three developmentally appropriate reading levels for each grade span.

Low
Mid
High

Each level of the book conveys similar concepts, images, and vocabulary.

Life Cycles

© Eric Isselee/123RF

Life Cycles

All living things go through changes as they grow and develop. Although individual organisms die, new ones replace them, ensuring the survival of the species. During its life cycle, an organism goes through physical changes that allow it to reach adulthood and produce new organisms. Since these changes are common within a species, they can be grouped into stages of development. The unit Life Cycles addresses the life cycles of plants and animals, including humans.

Overview Resources

Unit Nonfiction Books

Life Cycles

low

mid

high

Lesson Resources

Process Activities

Process Activity Materials Lists - All 3-4 units

Human Life Cycle Sequence

Life Cycles of Edible Plants

Mealworm Life Cycles

FOCUS Books

FOCUS Book Teacher's Guide | Projectable

The Mermaid's Purse
low

Life in the Pouch
mid

Maggots, Grubs, and Nymphs
mid

Pollywogs and Friends
mid

Veligers and Polyps
high

Supporting Materials

Investigation Packs

I.Files

Frogs
low

Elephants
mid

Moths
mid

Parrots
mid

Trees
mid

Barnacles
high

Mystery File

Dragonfly Naiads

Science Fair Resources

Science Fair Project Ideas

Debates

Debate Teacher's Guide Intermediate (3-6)

Adopting a Pet

Science Videos

Video Teaching Guide

Bees' Disease

New

Comparing Life Cycles

Moms Who Listen

Career Files

Fish Hatchery Worker; Dog Breeder; Seed Farmer

Quick Reads

Extreme Life Cycles
low

Extreme Life Cycles
mid

Extreme Life Cycles
high

Green Sea Turtles
low

Green Sea Turtles
mid

Green Sea Turtles
high

Honeybees
low

Honeybees
mid

Honeybees
high

Maple Seeds
low

Maple Seeds
mid

Maple Seeds
high

Mendel's Pea Plants
low

Mendel's Pea Plants
mid

Mendel's Pea Plants
high

Salmon
low

Salmon
mid

Salmon
high

Reading A-Z Books

Learning A-Z Connections - Life Cycles

The Mighty Saguaro Cactus - Level U

Graphic Organizers

All Intermediate Nonfiction Graphic Organizers

Venn Diagram

Word Smart

Retelling Rubrics

Nonfiction Retelling Rubric

Science Diagrams

Science Diagram Teacher's Guide

Life Cycle of a Butterfly

Life Cycle of a Frog

Game Packs

Complete Life Cycles Game Pack

Image Cards

Vocabulary Cards

Vocabulary Cards

Life Cycles

Word Work

Crossword; Word Search; Matching

Book Assembly

Single-Sided

Download Instructions

Double-Sided

Download Instructions

Sign up to receive our eNews, updates, and offers.

Subscribe You may unsubscribe at any time.

/ / / /

Connect with us on Facebook

Follow Us on Twitter

Watch Us on You Tube

© 2017 LAZEL, Inc. All rights reserved. Learning A-Z, Headsprout, Raz-Kids, and Science A-Z are registered trademarks of LAZEL, Inc. Reading A-Z, ReadyTest A-Z, Vocabulary A-Z, and Writing A-Z are trademarks of LAZEL, Inc. Other trademarks, logos, and service marks used in this site are the property of LAZEL, Inc. or third parties.