The RS4K Leveled Readers introduce young learners (Grades K–2) to foundational science concepts using age-appropriate, atoms-first language. These informational text readers are designed to build early science vocabulary and reading confidence so students arrive at Science Book 1 ready to engage with real science.
K–2 Digital Teaching Dashboards
The Atoms First K–2 Teaching Dashboards give young learners a full structured science curriculum before entering the Science Series. Each grade includes lesson plans, printable student materials, and curated digital readers organized by unit:
RS4K Reader Library
The RS4K Reader Library is a complete set of 71 leveled science readers organized by discipline—chemistry, biology, physics, geology, and astronomy. Students encounter accurate, atomic–molecular science language from the very beginning, building the vocabulary and conceptual foundation they'll carry through the full Science Series.
Science Literacy Bundles
Prefer to start smaller? The Science Literacy Bundles group readers by Lexile score so you can match the right level to your student:
Whether you choose print or digital, every RS4K product is built on the same promise: atoms-first science with authentic, atomic–molecular, ontologically accurate explanations, correct concepts from the start, a logical progression, and confidence-building learning for every student.
