A full-color textbook, grayscale workbook, and teacher key feature a dragonfly, poppy, snake, and baby on the covers.
Informational video discussing the contents of Friendly Biology.
The Friendly Biology textbook cover features a red dragonfly on a stick above photos of a poppy, snake, and baby.
Grayscale workbook pages show a crossword puzzle about subatomic particles and fill-in-the-blank carbohydrate facts.
Educational pages teach animal classification using charts and photos of a cat, lion, tiger, cheetah, and lynx.
Detailed photos in the textbook show an earthworm, leech, spider, and scorpion to illustrate different phyla.
The grayscale cover for the lesson tests and answer keys features a dragonfly and anatomical photos.
An open teacher book displays multiple-choice questions about biomes next to a comprehensive lettered answer grid.
A grayscale answer key shows a grid of correct letters for tests 15 through 28 in a Timberdoodle biology guide.
Grayscale workbook pages feature introductory fill-in-the-blank questions about the basic characteristics of life.
The grayscale student workbook cover features a dragonfly perched on a branch above a poppy, snake, and baby.
An open teacher book displays multiple-choice questions about biomes next to a comprehensive lettered answer grid.
Grayscale workbook pages feature introductory fill-in-the-blank questions about the basic characteristics of life.
An open teacher book displays multiple-choice questions about biomes next to a comprehensive lettered answer grid.
A video of a person slowly flipping through the pages of Friendly Biology while discussing what is on each page.

Friendly Biology - Christian Worldview

Friendly Biology makes high school science clear, doable, and yes—actually enjoyable. With vivid visuals, kitchen-table labs, and 28 well-paced lessons, it turns reluctant learners into confident biology students.

$99.95


Quantity:



Ages14+
Grades9th+
AvailabilityPhysical materials usually ship in 1-3 days. Access information for audio and video materials will be sent via email, typically within 2 business days.
Product Code821-600

You'll earn 100 Doodle Dollar points!

Consumable

Consumable

In a Curriculum Kit

In a Curriculum Kit

Multiple Grades

Multiple Grades

Spiral Learning

Spiral Learning


Please note: The video license is designed to accompany the course text, and is not a stand-alone curriculum. The audio and video portions of this course are non-refundable.

Included in this Curriculum Kit
2026 Ninth-Grade Curriculum Kit

2026 Ninth-Grade Curriculum Kit

Product Info
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Explore the Curriculum
Explore the Curriculum

See some sample pages from this series and browse all that it has to offer.

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Yes! You can record this as a lab science course on your student's high school transcript if they complete the labs.

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REVIEWS
What Our Customers Have To Say
  1. May 19, 2026

    Steph H.

    Friendly Biology has been a great addition to our school year. My 9th grade son has been able to take the lead on this subject which is great for the momma who went from homeschooling no kids to 5 kids. The book is easy to follow and the material presented in a clear and consise way that he can work through it mostly on his own. We have not done all of the included experiments because of time constraints or missing "ingredients", but most of the experiments are great because they don't require a lot of items that you don't already have at home. Sometimes we "cheated" and watched someone else do the experiment on YouTube. All in all, pleased with the inclusion of Friendly Biology in the ninth grade kit!

  2. April 17, 2026

    A P.

    This curriculum was kind of a dry textbook. It has some pretty pictures. We started using it as intended but decided it was too dry for us. I will say it was simple to read and easy to understand.

  3. June 26, 2024

    Easy to read

    Heather J.

    This book was very clear and easy for my child to understand. She enjoyed it.

  4. February 25, 2024

    LOVE TimberDoodle themselves! BUT...

    SherriAnn J.

    So far we love working with the curriculum kits from Timberdoodle! The only complaint we have so far is that the answer guides are not revised very well or closely. We have found NUMEROUS errors! Some of the answers are just cut off and not complete. Others are typos that are partially correct and such. Other then that, we love the kits! I would download a picture to show, but haveing some technical issues at the moment with my phone. But the very first lesson has some major typos and errors if you look at it and compare it with the students workbook lesson questions. One other complaint we have was that we thought that maybe it's better to just put ALL of the the lessons AS WELL AS TESTS into the students workbook and then JUST THE ANSWERS in the teachers books or answer books. Saves on us having to tear out and it gets all sloppy and messed up from not ripping out right or having to copy and waste the ink from our printers. Just a thought for the book companies. Timberdoodle is great otherwise and just can't say enough about them finding and picking out the books for us parents that homeschool fulltime! Thanks again!

  5. August 15, 2022

    Highly Recommend

    Rejetta S.

    I bought the secular Friendly Biology. I love that Timberdoodle is incorporating more secular curriculum. This book is well written, great pictures, and lots of great biology facts presented in an easy to learn format. With that being said, it is a high level, grade appropriate text book. I learned a lot of great things about biology that hadn't been as clear for me in high school! Really fun to learn alongside my children.

  6. October 15, 2020

    Friendly Biology

    Marjorie O.

    I like the clear, understandable explanations. We understand electrons better than we did from another program! I wish the test were a little more challenging.

  7. September 28, 2020

    Simple to use

    Jennifer S.

    The only problem I've found so far is in a cross word puzzle there was 1 to many blocks but no biggie . So far so good and love that it includes direction for lab experiments .

  8. May 31, 2018

    Friendly Biology

    R.B.

    I used this Biology curriculum this past year for the first time. I have always used Apologia, but wanted something that might be a better fit for my daughter. This is definitely a "friendly" approach with how material is presented in a way to help students understand difficult concepts. That being said, this first edition had several typos and mistakes in both the text book and work book. I am hopeful that this will be corrected in future additions. I would recommend that if you are going to use this, to see if the publisher has a list of updates so that you can go through and make the corrections. (Teaching Textbooks offered this.) Some of the mistakes were the kind that could confuse a student, and because of these issues I could only give a 3 star review.