9th – 12th

Trinitas Study Center

The Trinitas Study Center is a Christian education service designed to assist homeschooling parents and their high school students in the western Pennsylvania area.

Formerly called “Grove City Christian Academy Study Center” and begun in 2009, it is under the administration  of Grove City Christian Academy’s board of directors.


The Trinitas Study Center seeks to instruct children concerning the sovereign Lord of creation, the purpose He has for them, and the nature of the creation over which He has placed man.  We strive to equip and assist children to faithfully and obediently carry out man’s God-given task in Genesis 1:28: “God blessed them and said to them, ‘Be fruitful and increase in number; fill the earth and subdue it.  Rule over the fish of the sea and the birds of the air and over every living creature that moves on the ground.’”  We want their convictions and beliefs regarding the whole of life to be rooted in the Bible.  While striving for academic excellence in every discipline, Trinitas emphasizes a structured integration of our Christian world and life view in all of our studies.  We seek to reinforce the moral values and Christian faith that our students are taught in the home and church.

Why “Trinitas”?

“Trinitas” is the Latin word for “trinity,” coined by Tertullian to explain the relationship between the Father, Son, and Holy Spirit.

All the questions regarding our existence and knowledge are answered and find meaning in the trinity.   Not only was creation an act of the Trinity, but so is our redemption. The Father planned our redemption, Christ accomplished our redemption, and the Spirit applies the redemption to us!  In effect, all of life finds its basis and meaning there.

This is a fitting name for a Christian study center. All of our courses are based in the Trinity: the sciences because the Trinity is our Creator; composition, communication and languages because we are made in the image of the One who communicated to Himself and to His creation; math because the Trinity is a God of order; and history/literature because it reviews God’s historical providence and addresses the efforts of those who explain the world in light of the Trinity and others who do not.

Courses Offered Through Trinitas


This history course is the second course of our four year history program at Trinitas. It  will cover a period of about 1000 years, from 400-1550 A.D. EXAMPLES OF READINGS THAT MIGHT NEED TO BE PURCHASED: The Medieval World: An Illustrated Atlas by Nat’l Geographic The History of the Renaissance World: From the Rediscovery of Aristotle to the Conquest of Constantinople by Susan Wise Bauer City of God by Augustine Two Lives of Charlemagne by Einhard St. Thomas Aquinas and St. Francis of Assisi by Chesterton Martin Luther: Selections from His Writings


MEDIEVAL & EARLY MODERN LITERATURE: (1 Credit English/Literature)

This literature course is the second course of our four year literature program at Trinitas. This course will follow a roughly chronological sequence, pairing as closely as possible to the studies of the History course. EXAMPLES OF READINGS THAT MIGHT NEED TO BE PURCHASED: T.H. White’s Once and Future King History of the Kings of Britain The Saga of Volsungs Nibelungenlied: Prose Translation Macbeth (Folger Shakespeare Library) The Lais of Marie de France The Canterbury Tales by G Chaucer



This course is designed to be the last science course the student takes before high school biology or as an alternative for those who will not be taking physics. The text discusses such topics as the atmosphere, the hydrosphere, weather, the structure of the earth, environmentalism, the physics of motion, Newton’s Laws, gravity, and astrophysics.

TEXT: Exploring Creation with Physical Science, ed. 2—Dr. Jay Wile


BIOLOGY With LAB: (1 Credit Science)

This college-prep biology course provides a detailed introduction to the methods and concepts of general biology. Heavily emphasizing the vocabulary of biology, it provides the student with a strong background in the scientific method, the five kingdom classification scheme, microscopy, biochemistry, cellular biology, molecular and Mendelian genetics, evolution (part scientific theory, part unconfirmed hypothesis), dissection, and ecosystems.

TEXT: Exploring Creation with Biology, ed. 2—Dr. Jay Wile and Marilyn F. Durnell


CHEMISTRY WITH LAB: (1 Credit Science)

This college-prep course covers significant figures, units, classification, the mole concept, stoichiometry, thermochemistry, thermodynamics, kinetics, acids and bases, redox reactions, solutions, atomic structure, Lewis structures, molecular geometry, the laws, and equilibrium. Exams will be from the text as well as tutor-created exams with essays and critical thinking questions. NOTE: Algebra I is a prerequisite for this course. To be successful in chemistry, a student needs to be extremely proficient at rearranging algebraic equations to solve for an unknown variable.

TEXT: Exploring Creation with Chemistry, ed. 3—Dr. Jay Wile (2 nd printing)

PHYSICS WITH LAB: (1 Credit Science)

This college-prep physics course is designed for the student who has completed algebra and who has had an introduction to the definitions of sine, cosine, and tangent. It provides a detailed introduction to the methods and concepts of general physics, heavily emphasizing vector analysis. It provides the student with a strong background in one-dimensional and two dimensional motion, Newton’s laws and their application, gravity, work and energy, momentum, periodic motion, waves, optics, electrostatics, electrodynamics, electrical circuits, and magnetism. NOTE: Prerequisites for this course include Algebra I, Geometry, and basic Trigonometry functions such as vectors.

TEXT: Exploring Creation with Physics, ed. 2—Jay Wile MATH


ALGEBRA I: (1 Credit Math)

This course covers the basic algebraic concepts from a review of operations and functions through quadratic equations and number sequences. Topics of study include fundamental operations, functions and graphs, integers, rational numbers, equations in one variable, equations in two variable, simultaneous equations, exponents, polynomials, factoring, fractions, square roots, quadratic equations, real numbers, fractional equations, inequalities and number sentences. The text used will deal with the “why” before tackling the “how” in various algebraic principles.

TEXT: Bob Jones University Press, Algebra I (3rd edition)


GEOMETRY: (1 Credit Math)

This course covers basic geometrical concepts in areas including lines, angles, constructions, deductive reasoning with proofs, congruence, inequalities, quadrilaterals, transformations, area, similarity, right triangles, circles, concurrence theorems, polygons, geometric solids, and non-Euclidean geometries. The text used includes periodic algebra reviews and exercises with geometry problems from the SAT. NOTE: Prerequisite for this course is Algebra I.

TEXT: Geometry—Bob Jones University Press


ALGEBRA II: (1 Credit Math)

This course introduces and explores Operations, Linear Functions, Linear Relations, Quadratic Equations, Polynomial Functions, Systems of Equations and Inequalities, Radicals, and Rational Expressions and Equations. NOTE: Prerequisite for this course is Algebra I.

TEXT: Bob Jones University Press, Algebra II (3rd edition)



This course includes a short review of Algebra 2 and covers principles in Trigonometry including quadratic relations and systems, higher-degree functions and systems, sequences and series, probability, data analysis, functions of a random variable, trigonometric and circular functions and their properties, and triangle problems. NOTE: Prerequisite for this course is Algebra II. TEXT: Bob Jones University Press, Precalculus (2nd edition)


WRITING  INTRODUCTION TO COMPOSITION: (1 Credit English or Composition) Introducing students to a unique method for effective writing through the compositions of paragraphs and essays, the class provides the opportunity to perfect writing skills in both process and structure, along with learning basic grammar skills. The “how” of composition is emphasized, and at least 4 basic types of papers will be written. Throughout the course, students are encouraged to see writing as “verbal art,” and to approach this means of persuasive communication with a Biblical worldview and Christian approach to aesthetics. Students will write a research paper.

TEXTS: The Verbal Art Companion—Kathryn A. Van Til Grammar worksheets from Purdue Owl


WRITING IN THE CLASSICAL TRADITION: (1 Credit English or Composition)

This second of four writing courses offered by Trinitas is based on D’Angelo’s Composition in the Classical Tradition. Students will be led through 12 stages (fable, proverb, refutation, comparison, description, etc.) of the Progymnasmata, with gradual exercises that build writing proficiencies; they will learn to express themselves in a logical, well-reasoned way. For those students desiring to complete a term paper (for example, to meet requirements of a homeschool diploma program) additional supervision from the tutor can be scheduled for an additional cost (pending tutor approval). NOTE: Prerequisite for this course is the Study Center’s Intro to Composition or a similar “introduction to writing” class taken elsewhere

TEXTS: No text needed; there will be a small fee for a booklet of Xeroxed handouts.


RHETORIC I: (1 Credit English or Writing and speech)

Rhetoric is the study of written and oral communications and the art of persuasion. As a tool of learning, it equips students to present the truth, goodness, and beauty of what they have to say, no matter what the topic or arena. This course for upper level high school students teaches the theory of rhetoric as laid out by ancient thinkers like Aristotle, while allowing the students ample practice in analyzing and imitating persuasive writings and speeches of some of the great speakers and writers throughout history. It focuses on excellent writing and solid biblical thinking. The first year takes the students through two of Aristotle’s Five Canons of Rhetoric (Invention and Arrangement). Students will also write a term paper. NOTE: Prerequisite for this course is one Trinitas Study Center writing course.

TEXTS: Biblical Worldview Rhetoric I — Shaunna Howat The Penguin Book of Historic Speeches– Brian MacArthur



This class will learn the various hand-building techniques for clay. There will be a focus on creating sculpture as well as functional art. A new project will be created each nine weeks. TEXTS: No text needed, but art materials will need to be purchased.


SPANISH I: (1 Credit Foreign Language) This introductory Spanish course will focus on a multi-faceted approach for secondary language acquisition and use, crouched within the framework of a biblical world and life view. Growth in thinking, listening, writing, reading and speaking Latin American Spanish will be emphasized. NOTE: Internet access is required for this course.

TEXT: Vistas (can be used for 3 years)


SPANISH II: (1 Credit Foreign Language)

Growth in thinking, listening, writing, reading and speaking Latin American Spanish will be emphasized and knowledge that is integrally connected with the study of Spanish (in the realms of linguistics, history, geography, religion, music art, literature, and culture) will be incorporated. NOTE: Internet access is required for this course.

TEXT: Vistas (same one as above)