25x
25x: Life Sciences
A complete life science workbook combining full-length lessons with multimodal activities and chapter-by-chapter instructional support.
★★★★★ 5.0 · 12 reviews- 371 pages
- 5 units
- Published by 3andB
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What you get
- Twenty-five full-length lessons organize essential life science concepts across five focused units.
- Student-friendly explanations make biology and ecology concepts clear, structured, and memorable.
- Visual, verbal, reflective, and problem-based activities give students multiple ways to learn.
- Online videos, teacher slide decks, and lecture notes provide ready-to-teach instructional support.
- Vocabulary and higher-order activities help students explain concepts and examine biological relationships.
- The 371-page workbook provides a complete 2025–26 program with answer keys for every chapter.
This middle school science workbook is designed for classroom, homeschool, and hybrid learning. It also supports independent, self-paced students studying biology and ecology for the first time or reinforcing essential concepts.
About this workbook
3andB’s 25x: Life Sciences is a 371-page, 2025–26 workbook with 25 full-length, NGSS-aligned lessons for classroom, homeschool, and hybrid learning. Five units cover life’s building blocks, human body systems, genetics and heredity, evolution and adaptation, and ecology and interdependence.
Topics range from cells, photosynthesis, and body systems to DNA, natural selection, biodiversity, food webs, and biomes. Each lesson includes a student-friendly article, guided notes, vocabulary activities, crosswords, word searches, hypothetical scenarios, and higher-order reflection questions.
Online introduction videos, teacher slide decks, lecture notes, answer keys, and AI-powered tutor access for every chapter support instruction and independent learning. Through visual, verbal, reflective, and problem-based activities, students can build life science vocabulary, examine biological relationships, and explain essential concepts across biology and ecology.
The same shape, every time
In every lesson
A teacher can hand out any lesson in this book and know exactly what a student is getting.
- 1Student-friendly article
- 2Guided notes
- 3Vocabulary activities, crosswords, and word searches
- 4Hypothetical scenarios
- 5Higher-order reflection questions
- 6Online introduction video and teacher slide deck
- 7Lecture notes and answer keys
- 8AI-powered tutor access
What's inside
5 units, start to finish.
- Characteristics of Living Things
- Classification of Living Things
- Cells
- Cell Parts
- Photosynthesis & Aerobic Respiration
- 6. Human Body Systems
- 7. The Digestive System
- 8. The Respiratory System
- 9. The Circulatory System
- 10. The Skeletal & Muscular Systems
- 11. Cell Division: Mitosis
- 12. Meiosis & Reproduction
- 13. DNA Structure & Function
- 14. Genetics & Heredity
- 15. The Nervous System
- 16. Introduction to Evolution
- 17. Natural Selection
- 18. Adaptations & Survival
- 19. Fossils & The Fossil Record
- 20. Biodiversity & Conservation
- 21. Ecology & Levels of Organization
- 22. Autotrophs & Heterotrophs
- 23. Food Chains & Food Webs
- 24. Symbiosis & Ecosystem Interactions
- 25. Ecosystems & Biomes
From teachers who bought it
What teachers say
Fantastic bundle of books
These books are great and terrific for helping me teach these science courses to my students!
Life-science workbook
This bundle is an absolute goldmine for my 7th grade science classes! It covers exactly what I need and provides incredible structure and depth. The materials are clear, organized, and packed with rigorous content and engaging activities that make complex topics accessible for my students. It's been saving me hours of lesson prep. Worth every single penny!
Supplemental curriculum
I use this in my special education program as a supplemental material that the kids are actually engaged in.
Myself and my students love this resource! It's great
Great workbook for a year of middle school biology
As a high school science teacher, I enjoyed reading this middle school biology workbook. I was happy to see that the NGSS standards were covered in a traditional manner. There were some engaging pictures of animals and other things that kids might like as well as puzzles. I liked that the book was divided into 5 units, to go along with the NGSS standards, and that each one was covered with the same format. The key at the end described activities for each unit, listing mostly easily obtainable low-cost materials. The key included everything including critical thinking exercises but did not cover discussion of the chapter hypotheticals. Therefore I would love to see a companion workbook with materials lists by chapter, data sheets and relevant lab worksheets, and discussion of the hypotheticals. Also, I might suggest to interested entrepreneurial individuals that they might consider marketing materials kits to go with the activities.
A Well-Crafted, High Value Resource
The curriculum my school provided was incomplete, and the 25x resources were the perfect addition to providing a higher value of education to my students. The content is high quality and the questions are well-written. I could see how using all the resources would create a consistent education for students, but the similar format may eventually become repetitive. I do plan on holding on to these resources for years to come.
Well organized resource!
I used this to review my students before state testing! It was a great resource! I think next year I will use this to introduce my students to new topics or to reinforce my teaching.
Great Resource
Very engaging for students. They look forward to reading and interacting with this resource!
Exactly what middle school science should be—clear, engaging, and packed with value
I picked up 25x: Life Sciences to help support middle school learning at home, and I’m genuinely impressed with how well this workbook is put together. The layout is clean, the explanations are easy to follow, and every chapter builds in a way that actually keeps students interested. The guided notes, crosswords, “What if?” scenarios, and reflection questions make the lessons feel interactive instead of dry. I especially appreciate the answer keys, online intro videos, and lecture-style notes—it feels like having a full teacher’s toolkit in one place. This book covers everything: cells, genetics, body systems, evolution, ecology, and more, all in a way that makes sense for middle school students. It’s one of the most complete and accessible science resources I’ve seen, and I’m glad I bought it. Highly recommended for parents, teachers, and homeschoolers who want a solid, well-structured life science curriculum.
Really good supplemental material with this bundle. It has really good material to hopefully drive home the concepts.
Middle schoolers dream science lesson, quick & easy
This book keeps life science topics simple and easy to understand. I liked how each mini-lesson focused on one clear idea, like ecosystems or genetics, without overloading with details. The short quizzes after each section were helpful for checking understanding. Great for middle schoolers who need quick, focused lessons.
My students did well with this. They worked on finding the answers in the source and reviewing key information.
Written against
Standards this workbook covers
- NGSS Next Generation Science Standards
Questions teachers ask
What life science topics does the workbook cover?
The workbook covers life’s building blocks, human body systems, genetics and heredity, evolution and adaptation, and ecology and interdependence. Topics include cells, photosynthesis, DNA, natural selection, biodiversity, food webs, ecosystems, and biomes.
Does every chapter have an answer key?
Yes, answer keys and lecture notes are provided for every chapter. This page also offers an Answer Key for the Chapter among its free materials.
Can I preview the workbook before using it?
Yes, free material on this page includes a chapter preview, a student-only workbook, and a color workbook. You can also watch the video, view the slides, and access the chapter answer key.
Is the workbook ready to teach?
Yes, the workbook is described as requiring no preparation beyond opening it and teaching. Teacher slide decks, lecture notes, answer keys, and online introduction videos support instruction.
Can students use this workbook independently?
Yes, the workbook supports independent learning and self-paced students. Guided notes, student-friendly articles, varied activities, and AI-powered tutor access for every chapter provide additional structure.
Ready for your classroom
25x: Life Sciences · 371 pages · Middle School