15 Best Theory Courses Online
We compared 15 Theory courses currently listed on edX, Udemy and Coursera, priced from $19.99 to $215.00. 5 come from a named university or institution, including Seoul National University, Exner Education and Rochester Institute of Technology (RIT). They are ordered by our CourseAsk score, which is built from how thoroughly each course describes what it teaches, whether it comes from a named institution, and how it compares on price — not from star ratings, which our course data does not include.
- Courses compared
- 15
- Price range
- $19.99 – $215.00
- Providers
- edX, Udemy, Coursera
- Last updated
- 30 Aug 2026
How these 15 courses were chosen
Every course below is a real, currently listed course from edX, Udemy, Coursera, matched to "theory" by our catalog and ordered by our CourseAsk score. Courses whose own title names the topic rank above those only tagged with it.
The grade on each entry scores how much the provider publishes about the course before you pay — the length and detail of the description, whether it lists learning outcomes and objectives — and whether a named university or institution stands behind it. A is fully documented and institution-backed; E is little more than a title and a price. Courses with almost nothing published are left ungraded rather than marked down, because an unknown course and a poor one are not the same thing.
There are no star ratings on this page — the course feeds we license do not include them, and we would rather leave a column out than fill it with a number we cannot stand behind. What we do have is price: these range from $19.99 to $215.00, as listed by the provider when we last updated the page.
-
1
Counseling and Psychotherapy Theory
Offered by Seoul National University
Learn about the theories of counseling and psychotherapy on human change through an easy-to-understand overview.
$54.00listed price -
-
2
Manage Project Resources
Offered by Exner Education
In guiding a project, particularly one in the building and construction industry, an intricate knowledge of Project Resource Management is cr...
$199.99listed price -
3
Master of Architecture (M.Arch.)
Offered by Rochester Institute of Technology (RIT)
The Master of Architecture (M.Arch.) course offers an in-depth exploration of architectural design, theory, and practice. Through a combination of hands-on projects and theoretical frameworks, you'll learn how to create...
Price on site -
-
4
Master of Social Work
Offered by University of Denver
This Master of Social Work program offers a deep exploration into the principles and practices of social work. Students will engage with foundational theories, hands-on approaches, and current issues impacting social wor...
Price on site -
5
Electric charges and fields-Electrostatics
Mastering Electrostatics: Video Lectures and PDFs for Competitive ExamsDo you find the concepts of electrostatics challenging and complex? Look no further! Our comprehensive course, "Mastering Electrostatics," is designe...
$19.99listed price -
6
Udemy Certificateጃቫ ፕሮግራሚን በአማርኛ/Fundamentals of Java Programming in Amharic
ይህ ትምህርት የተመዘገቡ ተማሪዋች ቋንቋ ሳይገድባቸው በጣም አስፈላጊ የሆኑ የጃቫ ፕሮግራሚንግ የአሰራር ህግጋት ይማሩበታል። ትምህርቱ በተለያዩ ክፍሎች የተከፈለ ሲሆን፣ ቀስበቀስ ከመስረታዊ ህግጋት በመነሳት ወስብስብ ይሚባሉትን የጃቫ የአስራር ብልሃቶችን ይማሩበታል። በየማህሉ የቤት ስራ እንዲሁም መፍትሔዎቻቸው የያዙ ትምህርቶች አሉዋቸው። This...
$19.99listed price -
-
7
Udemy CertificateTot ce trebuie sa stii pentru 10 la BAC la Informatica
**** NOU ADAUGAT ****In ultima parte a cursului gasesti o sectiune de exercitii, unde iti poti testa cunostintele acumulate dupa vizionarea cursului. Fiecare modul de exercitii se concentreaza asupra unui tip de problema...
$199.99listed price -
8
Udemy CertificateFundamentals of Vegetation in Video Games
If you have always wanted to learn about vegetation but didn't know where to start, this course is for you! Entirely oriented to beginners, learn all the tips and tricks to know before starting your vegetation journey.Pl...
$19.99listed price -
9
Udemy CertificateDesigning Mechanisms using Fusion 360
Testimonials from students of Designing Mechanisms using Fusion 360: "Video content is high quality and very professional. Subject matter is relevant and is backed up with real world examples. Narrator is easy to underst...
$99.99listed price -
10
Udemy MOOC / Non-creditBiology IGCSE Course Unit 3
This Biology course is structured specifically around the latest Cambridge iGCSE and GCE Biology syllabus, ensuring complete and accurate coverage of every objective students need to master for their examinations. Studen...
$19.99listed price -
11
![[ATUALIZADO] DRONE - LEVANTAMENTO E PROCESSAMENTO DE IMAGENS](https://i.udemycdn.com/course/480x270/2398474_9a04_2.jpg)
Udemy Certificate[ATUALIZADO] DRONE - LEVANTAMENTO E PROCESSAMENTO DE IMAGENS
O curso de drone foi desenvolvido para o melhor aproveitamento dos alunos na teoria e na prática. Ele reúne informações teóricas e práticas baseadas no que o mercado mais necessita nos dias de hoje. É um conteúdo complet...
$184.99listed price -
12
Udemy MOOC / Non-creditCounterpoint 1
Counterpoint is the art of combining two or more independent melodies. In this course, by award-winning composer Jonathan Peters, you will learn how to write counterpoint using a method called "species counterpoint". Man...
$39.99listed price -
13
Coursera MOOC / Non-creditIntroduction to Relational Databases
Offered by Illinois Tech
Database management systems are a crucial part of most large-scale industry and open-source systems. This course will introduce you to important concepts of database systems and design. We will learn what relational data...
$49.00listed price -
14
![Functii Injective, Surjective, Bijective & Inversabile [X]](https://i.udemycdn.com/course/480x270/5120570_b27b_3.jpg)
Udemy MOOC / Non-creditFunctii Injective, Surjective, Bijective & Inversabile [X]
This course provides a solid understanding of injective, surjective, bijective, and invertible functions, tailored for students in grade X. You’ll explore various exercises that enhance your grasp of these concepts, usin...
$144.99listed price -
15
An Introduction to Credit Risk Management
Offered by Delft University of Technology
What is credit risk? Why is it so important, in modern economies, to correctly deal with it? This course combines theory with practice to answer these questions.
$215.00listed price
Best Theory Courses Online compared
Prices shown are the provider's listed price when we last updated this page. Confirm on their site before enrolling.
What the prices here tell you
The 13 priced courses on this page run from $19.99 to $215.00, with the middle of the range around $54.00 — a spread of $195.01. That is a wide gap for one subject. A higher price on this page usually reflects who is behind the course rather than how much material it contains, so it is worth opening two or three at different price points and comparing their syllabus before deciding.
Who is behind these courses
These courses come from edX, Udemy and Coursera. The platforms differ in how they sell: some charge once per course, others expect a subscription, and the listed price is not always what you pay at checkout after a promotion. 5 of these are produced by a named university or institution, including Seoul National University, Exner Education and Rochester Institute of Technology (RIT) — which usually means a fixed syllabus and a recognised certificate, rather than an individual instructor’s own course.
Before you enrol
Open the provider’s own page and check three things this comparison cannot tell you: when the course was last updated, what the syllabus actually covers in its later sections, and what recent learners say. Prices shown here are the provider’s listed price when we last rebuilt this page on 30 August 2026 — they change often, and a promotion can move them substantially. We earn a commission if you enrol through our links, which costs you nothing and never affects the order courses appear in.