Need help with chemical reactions, molecular structures, or exam prep? Get clear, step-by-step guidance to build confidence and succeed in chemistry.

General Chemistry

Jules

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Patrick

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General Biology

Jason

Confused by balance sheets, income statements, or debits and credits? Get accounting concepts broken down step-by-step to build confidence for assignments and exams.

Financial Accounting

Brian

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Introduction to Psychology

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Microeconomics

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Anatomy & Physiology

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College Algebra

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Organic Chemistry

Johnny

From Punnett squares to gene expression and DNA replication, genetics concepts are explained clearly to make problem solving more straightforward.

Genetics

Kylia

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GOB Chemistry

New to chemistry? Atoms, elements, and reactions are broken down into simple steps to build a strong foundation for success in class and labs.

Introduction to Chemistry

Struggling with bacteria, viruses, or lab techniques? Microbiology concepts are simplified to keep studying efficient and exam prep on track.

Microbiology

From membranes and organelles to signaling pathways, cell biology is explained clearly to connect structure and function with ease.

Cell Biology

Need help with titrations, spectroscopy, or chromatography? Analytical chemistry concepts are simplified to support labs and problem sets.

Analytical Chemistry

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Trigonometry

Callie

Need a solid foundation before calculus? Precalculus concepts like functions, sequences, and limits are clarified to prepare you for success.

Precalculus

Nick

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Calculus

Want to apply calculus to real-world business problems? Rates, optimization, and economic models are explained in simple terms for practical use.

Business Calculus

From probability to hypothesis testing, statistics concepts are explained step-by-step to build problem-solving skills and exam readiness.

Introductory Statistics

Struggling with data analysis, probability, or regression? Statistics is connected to real-world business decisions to make concepts easier to apply.

Statistics for Business

From proteins and enzymes to metabolism and pathways, biochemistry concepts are connected across chemistry and biology for deeper understanding.

Biochemistry

Need help with GDP, inflation, or monetary policy? Macroeconomics is simplified to highlight the big picture and boost exam performance.

Macroeconomics

Learn topics such as nutrition, physical activity, mental health, stress management and healthy lifestyle choices.

Personal Health

From macronutrients and vitamins to metabolism and diet planning, nutrition concepts are explained clearly and connected to real-life examples.

Nutrition

Learn how medical terms are built and what they mean by breaking them into simple parts. This course helps you understand and use the language of healthcare with confidence.

Medical Terminology

Explore how human societies are organized, how social relationships shape behavior, and how cultural, economic, and political forces influence everyday life.

Introduction to Sociology

Learn the toughest concepts covered in Beginning Algebra with step-by-step video tutorials and practice problems by world-class tutors 

Beginning Algebra

Learn the toughest concepts covered in Intermediate Algebra with step-by-step video tutorials and practice problems by world-class tutors 

Intermediate Algebra

Learn the toughest concepts covered in Beginning & Intermediate Algebra with step-by-step video tutorials and practice problems by world-class tutors

Beginning & Intermediate Algebra

Confused by cells, genetics, or how life works? Explore the building blocks of biology with simple, engaging explanations that turn complex science into concepts you'll actually understand.

Introductory Biology

Curious about how your body works? Dive into human biology with clear, approachable lessons that break down anatomy, physiology, and everything that keeps you alive and thriving.

Human Biology

Physics with Algebra

Need a solid foundation before calculus? Algebra and Trigonometry concepts like functions and sequences are clarified to prepare you for success.

Algebra & Trigonometry

From logic and problem solving to voting systems, personal finance, and statistics, liberal arts math topics are explained step-by-step to build confidence with real-world mathematical thinking and strong preparation for quizzes and exams.

Liberal Arts Math

From logic and problem solving to ratios, finance, and statistics, quantitative reasoning concepts are explained step-by-step to build confidence applying mathematics to everyday situations, workplace contexts, and practical decision-making.

Quantitative Reasoning

Learn the type of accounting that focuses on providing financial information to internal stakeholders within an organization

Managerial Accounting

Tyler

Learn the guidelines that govern how financial transactions are recorded and reported

Principles of Accounting

From whole numbers and integers to equations and graphing, develop a strong understanding of foundational math concepts with clear, step-by-step support every step of the way.

Prealgebra

Master the fundamentals of algebra as you solve equations, analyze patterns, and work with mathematical relationships through guided, step-by-step instruction.

Prealgebra & Beginning Algebra

From foundational arithmetic through advanced algebraic concepts, develop the skills to solve increasingly complex mathematical problems with comprehensive, step-by-step support.

Prealgebra, Beginning Algebra, & Intermediate Algebra

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Digital Marketing Analytics

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In this Python course you will learn how to : think like a programmer, solve mini practice problems in Python and build three small games. 
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Microsoft Power BI

In this course you will learn what blockchain and cryptocurrency are, how they work, and how these technologies are being applied. The course explains what smart contracts are and how they work, the rise of new funding mechanisms.

Blockchain and Cryptocurrency

In this course expert developer Lee Donahoe and renowned instructor Michael Hartl teach the specific concepts, skills, and approaches in HTML, CSS and Layouts you need to get the job done.

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A 60 kg adult eats a 200 g portion of tuna containing 0.35 mg/kg methylmercury. Using the EPA reference dose of 0.1 µg/kg body weight per day, calculate the adult's methylmercury intake in µg/kg/day from this meal and determine whether it exceeds the EPA RfD (show calculations).