Biology, fourth edition (A.C.E.)

Biology, fourth edition (A.C.E.)

A.C.E.’s Biology course for high school is presented in 12 PACEs—booklets that contain both instructional material and workbook pages for students to write answers to questions directly in each PACE. Students also need to watch the free online lab videos.

The topics covered in the twelve PACES are:

  • Birds
  • Mammals
  • Fish, Amphibians, and Reptiles
  • Invertebrates (sponges, cnidarians, mollusks, and echinoderms)
  • Invertebrates (segmented worms, flatworms, roundworms, and arthropods)
  • The Plant Kingdom
  • Eukaryotes and Prokaryotes
  • Integumentary, Skeletal, and Muscular Systems
  • Nervous, Circulatory, and Respiratory Systems
  • Digestive, Excretory, and Endocrine Systems
  • Reproduction and Genetics
  • Environmental Science

Compared to other high school biology courses, A.C.E.’s Biology spends proportionately more time on human anatomy and physiology, with one-third of the PACES devoted to that topic. (In comparison, BJU Press’s Biology course devotes one-fifth of the course to human anatomy and physiology. And Apologia Press addresses human anatomy and physiology only within its presentation about other mammals in their biology course, although they have an entirely separate course titled Exploring Creation with Advanced Biology: The Human Body.)

The Lessons

Each PACE is divided into three or four sections that each cover sub-topics. Each of these sections begins with a list of vocabulary words, a pronunciation key, and definitions. This is followed by an exercise with the vocabulary words. The information taught in each section is further divided into three or more lessons. Usually, each lesson has two or three pages of text with colorful illustrations. The pages of text are followed by an extensive set of questions. These questions might be multiple-choice, fill in the blanks, true/false, or matching columns. The questions often conclude with lines where students are to write out the scripture memory verses assigned for memorization by that PACE. Each group of lessons on a subtopic is followed by a Checkup with two pages of questions that review the content of the section’s lessons.

This course uses a mastery approach. Frequent tests ensure that students are learning the material. Student work needs to be checked as it is completed since students are not supposed to continue working ahead if they have not mastered each section. At the end of each PACE is a self test covering all of that PACE’s lessons. In the center of each PACE is a test that should be removed before the PACE is given to the student. If the student scores satisfactorily on the self test, they should be given the test. There are four Score Key booklets for the course—one for every three PACEs. Since answers are predictable and brief, checking student work should take little time.

The course is designed so that students can work independently, and the teacher or supervisor does not need to know the subject matter. Consequently, the course relies on lower levels of thinking—comprehension and recall—rather than critical thinking skills. The strong emphasis on the mastery of vocabulary is in line with that approach.

Course questions and tests rely on the student’s memory of what they have read rather than deep thinking and analysis. That means that students are more likely to spend time looking for the exact word required, rather than pondering concepts. This approach will work for some students, but those with inquisitive minds might find it too restrictive.


Excellent, online lab videos are included for free at There are two videos for each PACE, and the PACEs tell students when they are to watch one of the videos. The lab videos include a greater variety of lab activities than most homeschoolers probably experience if they are working on their own.

Examples of some of the lab activities are an introduction to the microscope, microscopic observations of chicken embryos at different stages of development, blood typing, nutrient analysis, and dissection of a fetal pig. Students are shown both actual and microscopic views of dissections, so they probably see more than if they were doing their own dissections

Students do no actual lab work, but they answer a brief set of questions in their PACE for each lab video. Even though students don’t do their own lab work, the videos do an excellent job of familiarizing them with various types of lab activities and equipment.

Christian Content

Christian content integrated throughout the course reflects a fundamentalist Protestant point of view. The Christian content is presented within the sections on biological information. For instance, in PACE 1107 on reproduction and genetics, it says, “The fact that Adam’s DNA lives on in us has a sobering side to it, though. Not only do we share Adam’s DNA, we also share his sin nature” (p.16). It continues with a Bible verse (Romans 5:12) and explains original sin and the message of salvation in a section that takes about one full page. The questions following this section of instructional material include theological questions. Extensive theologically-oriented sections like this are rare. However, every PACE begins with a story that has some theological content, and each PACE concludes with text that might contain scripture verses or theological concepts. In addition, students are to memorize the two Scripture verses included at the beginning of each PACE.


A.C.E.’s Biology course offers an affordable course that is easy to use for independent study.

Pricing Information

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Set of student PACEs - $42, set of answer keys - $14

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Instant Key

  • Need For Parent or Teacher Instruction: minimal
  • Learning Environment: independent study
  • Grade Level: grades 9-12
  • Educational Methods: multisensory, memorization, mastery learning
  • Technology: video, online
  • Educational Approaches: traditional
  • Religious Perspective: Protestant

Publisher's Info

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