Leveled Readers

Does your science program support your literacy block?

Give students the opportunity to explore ideas in greater depth at their own pace while meeting real-world scientists and engineers with Twig Science Leveled Readers.

Bringing Science and Literacy Together

Available in print and digital formats, Twig Science’s high-interest, magazine-style leveled readers give students the opportunity to explore ideas in greater depth at their own pace while meeting real-world scientists and engineers. They’re available at four levels—On-Level, Above-Level, Below-Level, and English Learner—and are ideal for use in differentiated small-group reading time.

Suitable for Dual Immersion

All our readers are also available in Spanish. Twig Science en Español readers recognize the validity of using a primary language to promote acquisition of a second language.

“Language is Fundamental to Science”

An Easy Time-Saver

We all know that teachers are often tight on time. With new frameworks and state standards to keep in mind, there is an increasing pressure to prepare students for state assessments while not neglecting any subject or topic. Thankfully, there are ways to teach more efficiently. An easy time-saver is teaching two subjects at once.

Magazine-Style Readers

Twig Education’s magazine-style leveled readers can be used during science or English Learning time to build knowledge and check understanding. Not only does this save time—it can also actually increase understanding among students.

Backed by Research

In fact, studies have found that incorporating literacy into other subjects, such as science, is essential to significantly improving student literacy. Likewise, addressing literacy in, for example, science class has been shown to improve students’ science skills. Yore et al. (2003) have argued that “language is fundamental to science” and “literacy strategies allow students to develop their understanding of science and to do and communicate science.”

Three-Chapter Structure

1. Exploring Phenomena

Build curiosity about a phenomenon—students will discover what we know and how we know it.

2. STEM Career

Introduce students to professionals working in STEM careers in these fascinating interviews with real scientists.

3. Real-World Connection

Connect students’ learning to the real world—showing why they should care about the phenomenon and how it affects them.


Be a Scientist Micro-Labs

Be a Scientist features encourage students to take part in real scientific experiments and investigations in the form of optional micro-labs.

These activities can be done without specialist equipment, and student-facing instructions are provided.

Visual Glossary

Each leveled reader features a visual glossary that provides definitions for key terms and scientific vocabulary for Tier 2 and Tier 3 vocabulary support.

Cool Tools, On the Job, and A Day in the Lab

Follow in the footsteps of some seriously cool scientists and engineers.

Discover what incredible equipment and skills the scientists interviewed in each reader use to conduct and record their experiments.

Wiley Blevins


An author and reading specialist, Wiley has written several books on reading instruction and teaching students to read informational text.

He is a cross-curricular expert with extensive experience in English Language Arts and English Learners, including graduate work in education at Harvard University, elementary classroom teaching, and professional development in the United States, Latin America, and Asia.

Discover new strategies for introducing students to informational text developed by award-winning author and phonics specialist Wiley Blevins by downloading his white paper.

Example Readers

Take a sneak peek at this chapter on Ramadan from our 1st Grade Leveled Reader Day and Night by Wiley Blevins.

Full K-6 Catalog


The Friendly Kakapo

Wiley Blevins

Phenomenon: Different plants and animals live in different places.

Pushes and Pulls

Wiley Blevins

Phenomenon: What happens when we push, pull, and drop objects? How can we change their speed and direction?

What’s the Weather?

Wiley Blevins

Phenomenon: How do we observe weather and collect data to describe weather patterns over time?

Animal Builders

Wiley Blevins

Phenomenon: How do animals change their environments?

Grade 1

Our Leafy Friends

Wiley Blevins

Phenomenon: How are all plants alike and how are they different?

Animal Talk

Wiley Blevins

Phenomenon: How do animals use their body parts, communicate with their young, and make sounds?


Samantha Z. Miller

Phenomenon: Why do skyscrapers create shadows in cities?

Day and Night

Wiley Blevins

Phenomenon: What patterns do we observe in the sky?

Grade 2

What is a Map?

Elizabeth Raum

Phenomenon: How can we understand and describe the land and water on Earth?

What is it Made of?

Linda B. Ross

Phenomenon: How can we describe materials as different from one another and understand how their properties relate to their use?

Incredible Erosion

Samantha Z. Miller

Phenomenon: How do natural processess shape the Earth?

Where Are the Bees?

Linda B. Ross

Phenomenon: How do living things in an environment depend on one another and what do they need to grow?

Grade 3

Roller Coaster Ride

Lisa Lerner

Phenomenon: How are objects affected by the forces of push and pull?

Life Cycles

Elizabeth Raum

Phenomenon: How do plants’ and animals’ life cycles help them survive?

Surviving in Different Environments

Samantha Z. Miller

Phenomenon: What is the relationship between an organism and its environment?

Weather Hazards

Jennifer Rose

Phenomenon: What is the weather like around the world?

Grade 4

The Science of Baseball

David McGinty

Phenomenon: What happens to energy when objects collide?

Renewable Energy

Victoria G Christensen

Phenomenon: How do people produce and transfer energy for their use?

Sculpting Landscapes

Rebecca Rector

Phenomenon: How have weathering and erosion sculpted some of the Earth’s most interesting landscapes?

Shake, Rattle, and Roll

Alice Boynton

Phenomenon: How can we reduce the damage caused by earthquakes?

Amazing Animal Senses

Rebecca Rector

Phenomenon: How do the many parts of an animal’s body work together to help it live in the world?

Grade 5

Absolute Zero

Audrey Carangelo

Phenomenon: What are the structures and properties of matter?

The Galápagos Islands

Deirdre A. Prischmann

Phenomenon: How do matter and energy move through an ecosystem?

Where’s the Water?

Victoria G Christensen

Phenomenon: Why do some places lack fresh water and what can we do to protect it?

Looking to the Stars and Beyond

Rebecca Rector

Phenomenon: What patterns fo we notice when we observe the sky?

Grade 6

It’s Alive!

Allison Lassieur

Phenomenon: How do human body systems and subsystems work together?

What Causes Weather?

Audrey Carangelo

Phenomenon: Weather and climate vary around the world, but we can use science and past trends to predict them.


Barbara M. Linde

Phenomenon: How do the environment and genetics affect animals and plants?

Global Warming

Allison Lassieur

Phenomenon: How can we reduce harmful impacts on the environment in the places where people live?