Online courses directory (381)

Birth of the Gothic: Abbot Suger and the Ambulatory at St. Denis. Two Royal Figures (Saljuq Period). Last Judgment Tympanum, Cathedral of St. Lazare, Autun. Sutton Hoo Ship Burial. Virgin from Ger. Wise and Foolish Virgins, Sant Quirze de Pedret. Coronation Mantle. Sarcophagus of Junius Bassus. Basilica of Santa Prassede (Praxedes). Santa Sabina. Byzantine Art: Justinian and His Attendants. Historiated Capitals, Church of Sant Miquel, Camarasa (Noguera). Santa Maria Maggiore. Ivory panel with Archangel. Berlinghieri's St. Francis Altarpiece. Cathedral of Notre Dame de Chartres. Ilkhanid Mihrab. Hebrew Astrolabe. Pre-Columbian Cup.

Were the Middle Ages really all that dark? Hardly! How could we call the period that saw the building of Chartres Cathedral with its stunning stained-glass windows, dark? Sure, the Roman empire collapsed, but with the Christianization of Europe came magnificent churches, illuminated bibles, and intricately designed broaches. This period also saw the birth of Islam, the third great monotheistic religion. Introduction. Medieval and Byzantine Art. A New Pictorial Language: The Image in Early Medieval Art. Iconoclasm. Medieval Manuscripts. The Bestiary. Beginner's Guide to Medieval Art. An Introduction to Christianity. Standard Scenes from the Life of Christ in Art. An Introduction to Early Christian Art. Early Christian Art & Architecture after Constantine. Sarcophagus of Junius Bassus. Santa Sabina. Santa Maria Maggiore. The Mausoleum of Galla Placidia, Ravenna. Early Christian. Sutton Hoo Ship Burial. The Lindesfarne Gospels. Medieval and Byzantine Art. San Vitale. Sant'Apollinare in Classe, Ravenna, Italy, c. 533-49. Hagia Sophia. Ivory panel with Archangel. Icon of Saint George (the "Black George"). Icon of the Triumph of Orthodoxy. Byzantine Art. Introduction to Islam. The Five Pillars of Islam. Arts of the Islamic World. Two Royal Figures (Saljuq Period). Coronation Mantle. Ilkhanid Mihrab. Hebrew Astrolabe. Qa'a: The Damascus Room. Carolingian Art: An Introduction. Charlemagne: An Introduction (1 of 2). Charlemagne and the Carolingian Revival (part 2 of 2). Saint Matthew from the Ebbo Gospel. Lindau Gospels Cover. Santa Prassede (Praxedes). Carolingian. Ottonian Art: An Introduction. Bronze doors, Saint Michael's, Hildesheim, commissioned by Bishop Bernward, 1015. Pilgrimage Routes and the Cult of the Relic. Pentecost and Mission to the Apostles Tympanum, V

New to art? If so, this is a good place to start. We often think we should understand what we see and that we know what we like, but art can be challenging. It has meant different things at different moments in history. Art gives us access to the way other people have seen the world. Jump in and explore!. A Beginner's Guide to the History of Western Culture. Common Questions about Dates. Why Look at Art?. The Skill of Describing. The Skill of Describing. The Classical Orders. How One-Point Linear Perspective Works. Art History Basics. Woodcuts and Etchings. Tempera Paint. Oil Paint. Oil Paint in Venice. Bronze Casting. Quarrying & Carving Marble. Art History - Media. A Beginner's Guide to the History of Western Culture. Common Questions about Dates. Why Look at Art?. The Skill of Describing. The Skill of Describing. The Classical Orders. How One-Point Linear Perspective Works. Art History Basics. Woodcuts and Etchings. Tempera Paint. Oil Paint. Oil Paint in Venice. Bronze Casting. Quarrying & Carving Marble. Art History - Media.

Videos on how banks work and how money is created. Banking 1. Banking 2: A bank's income statement. Banking 3: Fractional Reserve Banking. Banking 4: Multiplier effect and the money supply. Banking 5: Introduction to Bank Notes. Banking 6: Bank Notes and Checks. Banking 7: Giving out loans without giving out gold. Banking 8: Reserve Ratios. Banking 9: More on Reserve Ratios (Bad sound). Banking 10: Introduction to leverage (bad sound). Banking 11: A reserve bank. Banking 12: Treasuries (government debt). Banking 13: Open Market Operations. Banking 14: Fed Funds Rate. Banking 15: More on the Fed Funds Rate. Banking 16: Why target rates vs. money supply. Banking 17: What happened to the gold?. Banking 18: Big Picture Discussion. The Discount Rate. Repurchase Agreements (Repo transactions). Federal Reserve Balance Sheet. Fractional Reserve Banking Commentary 1. FRB Commentary 2: Deposit Insurance. FRB Commentary 3: Big Picture. LIBOR.

Diffusion and Osmosis. Parts of a cell. Chromosomes, Chromatids, Chromatin, etc.. Mitosis, Meiosis and Sexual Reproduction. Phases of Mitosis. Phases of Meiosis. Embryonic Stem Cells. Cancer. Diffusion and Osmosis. Parts of a cell. Chromosomes, Chromatids, Chromatin, etc.. Mitosis, Meiosis and Sexual Reproduction. Phases of Mitosis. Phases of Meiosis. Embryonic Stem Cells. Cancer.

ATP: Adenosine Triphosphate. Introduction to Cellular Respiration. Oxidation and Reduction Review From Biological Point-of-View. Oxidation and Reduction in Cellular Respiration. Krebs / Citric Acid Cycle. Glycolysis. Electron Transport Chain. Oxidative Phosphorylation and Chemiosmosis. ATP: Adenosine Triphosphate. Introduction to Cellular Respiration. Oxidation and Reduction Review From Biological Point-of-View. Oxidation and Reduction in Cellular Respiration. Krebs / Citric Acid Cycle. Glycolysis. Electron Transport Chain. Oxidative Phosphorylation and Chemiosmosis.

Introduction to Evolution and Natural Selection. Ape Clarification. Intelligent Design and Evolution. Evolution Clarification. Natural Selection and the Owl Butterfly. DNA. Variation in a Species. Introduction to Evolution and Natural Selection. Ape Clarification. Intelligent Design and Evolution. Evolution Clarification. Natural Selection and the Owl Butterfly. DNA. Variation in a Species.

Introduction to Heredity. Punnett Square Fun. Hardy-Weinberg Principle. Sex-Linked Traits. Genetics 101 Part 1: What are genes?. Genetics 101 Part 2: What are SNPs?. Genetics 101 Part 3: Where do your genes come from?. Genetics 101 Part 4: What are Phenotypes?. Introduction to Heredity. Punnett Square Fun. Hardy-Weinberg Principle. Sex-Linked Traits. Genetics 101 Part 1: What are genes?. Genetics 101 Part 2: What are SNPs?. Genetics 101 Part 3: Where do your genes come from?. Genetics 101 Part 4: What are Phenotypes?.

The Lungs and Pulmonary System. Red blood cells. Circulatory System and the Heart. Hemoglobin. Anatomy of a Neuron. Sodium Potassium Pump. Correction to Sodium and Potassium Pump Video. Electrotonic and Action Potentials. Saltatory Conduction in Neurons. Neuronal Synapses (Chemical). Myosin and Actin. Tropomyosin and troponin and their role in regulating muscle contraction. Role of the Sarcoplasmic Reticulum in Muscle Cells. Anatomy of a muscle cell. The Kidney and Nephron. Secondary Active Transport in the Nephron. The Lungs and Pulmonary System. Red blood cells. Circulatory System and the Heart. Hemoglobin. Anatomy of a Neuron. Sodium Potassium Pump. Correction to Sodium and Potassium Pump Video. Electrotonic and Action Potentials. Saltatory Conduction in Neurons. Neuronal Synapses (Chemical). Myosin and Actin. Tropomyosin and troponin and their role in regulating muscle contraction. Role of the Sarcoplasmic Reticulum in Muscle Cells. Anatomy of a muscle cell. The Kidney and Nephron. Secondary Active Transport in the Nephron.

Role of Phagocytes in Innate or Nonspecific Immunity. Types of immune responses: Innate and Adaptive. Humoral vs. Cell-Mediated. B Lymphocytes (B cells). Professional Antigen Presenting Cells (APC) and MHC II complexes. Helper T Cells. Cytotoxic T Cells. Review of B cells, CD4+ T cells and CD8+ T cells. Inflammatory Response. Role of Phagocytes in Innate or Nonspecific Immunity. Types of immune responses: Innate and Adaptive. Humoral vs. Cell-Mediated. B Lymphocytes (B cells). Professional Antigen Presenting Cells (APC) and MHC II complexes. Helper T Cells. Cytotoxic T Cells. Review of B cells, CD4+ T cells and CD8+ T cells. Inflammatory Response.

ATP: Adenosine Triphosphate. Photosynthesis. Photosynthesis: Light Reactions 1. Photosynthesis: Light Reactions and Photophosphorylation. Photosynthesis: Calvin Cycle. Photorespiration. C-4 Photosynthesis. CAM Plants. ATP: Adenosine Triphosphate. Photosynthesis. Photosynthesis: Light Reactions 1. Photosynthesis: Light Reactions and Photophosphorylation. Photosynthesis: Calvin Cycle. Photorespiration. C-4 Photosynthesis. CAM Plants.

Taxonomy and the Tree of Life. Species. Bacteria. Viruses. Human Prehistory 101: Prologue. Human Prehistory 101 Part 1: Out of (Eastern) Africa. Human Prehistory 101 Part 2: Weathering The Storm. Human Prehistory 101 Part 3: Agriculture Rocks Our World. Human Prehistory 101: Epilogue. Taxonomy and the Tree of Life. Species. Bacteria. Viruses. Human Prehistory 101: Prologue. Human Prehistory 101 Part 1: Out of (Eastern) Africa. Human Prehistory 101 Part 2: Weathering The Storm. Human Prehistory 101 Part 3: Agriculture Rocks Our World. Human Prehistory 101: Epilogue.

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!. Liar Truth-teller Brain Teaser. Toggler Brain Teaser. Alien Abduction Brain Teaser. Blue Forehead Room Brain Teaser. Blue Forehead Room Solution. Forehead Numbers Brain Teaser. Light Bulb Switching Brain Teaser. Path Counting Brain Teaser. 3-D Path Counting Brain Teaser. Liar Truth-teller Brain Teaser. Toggler Brain Teaser. Alien Abduction Brain Teaser. Blue Forehead Room Brain Teaser. Blue Forehead Room Solution. Forehead Numbers Brain Teaser. Light Bulb Switching Brain Teaser. Path Counting Brain Teaser. 3-D Path Counting Brain Teaser.

Sal working through the 53 problems from the practice test available at http://www.cde.ca.gov/ta/tg/hs/documents/mathpractest.pdf for the CAHSEE (California High School Exit Examination). Clearly useful if you're looking to take that exam. Probably still useful if you want to make sure you have a solid understanding of basic high school math. CAHSEE Practice: Problems 1-3. CAHSEE Practice: Problems 4-9. CAHSEE Practice: Problems 10-12. CAHSEE Practice: Problems 13-14. CAHSEE Practice: Problems 15-16. CAHSEE Practice: Problems 17-19. CAHSEE Practice: Problems 20-22. CAHSEE Practice: Problems 23-27. CAHSEE Practice: Problems 28-31. CAHSEE Practice: Problems 32-34. CAHSEE Practice: Problems 35-37. CAHSEE Practice: Problems 38-42. CAHSEE Practice: Problems 43-46. CAHSEE Practice: Problems 47-51. CAHSEE Practice: Problems 52-53. CAHSEE Practice: Problems 1-3. CAHSEE Practice: Problems 4-9. CAHSEE Practice: Problems 10-12. CAHSEE Practice: Problems 13-14. CAHSEE Practice: Problems 15-16. CAHSEE Practice: Problems 17-19. CAHSEE Practice: Problems 20-22. CAHSEE Practice: Problems 23-27. CAHSEE Practice: Problems 28-31. CAHSEE Practice: Problems 32-34. CAHSEE Practice: Problems 35-37. CAHSEE Practice: Problems 38-42. CAHSEE Practice: Problems 43-46. CAHSEE Practice: Problems 47-51. CAHSEE Practice: Problems 52-53.

Sample questions from the A.P. Calculus AB and BC exams (both multiple choice and free answer). 2011 Calculus AB Free Response #1a. 2011 Calculus AB Free Response #1 parts b c d. 2011 Calculus AB Free Response #2 (a & b). 2011 Calculus AB Free Response #2 (c & d). 2011 Calculus AB Free Response #3 (a & b). 2011 Calculus AB Free Response #3 (c). 2011 Calculus AB Free Response #4a. 2011 Calculus AB Free Response #4b. 2011 Calculus AB Free Response #4c. 2011 Calculus AB Free Response #4d. 2011 Calculus AB Free Response #5a. 2011 Calculus AB Free Response #5b. 2011 Calculus AB Free Response #5c.. 2011 Calculus AB Free Response #6a. 2011 Calculus AB Free Response #6b. 2011 Calculus AB Free Response #6c. AP Calculus BC Exams: 2008 1 a. AP Calculus BC Exams: 2008 1 b&c. AP Calculus BC Exams: 2008 1 c&d. AP Calculus BC Exams: 2008 1 d. Calculus BC 2008 2 a. Calculus BC 2008 2 b &c. Calculus BC 2008 2d. 2011 Calculus BC Free Response #1a. 2011 Calculus BC Free Response #1 (b & c). 2011 Calculus BC Free Response #1d. 2011 Calculus BC Free Response #3a. 2011 Calculus BC Free Response #3 (b & c). 2011 Calculus BC Free Response #6a. 2011 Calculus BC Free Response #6b. 2011 Calculus BC Free Response #6c. 2011 Calculus BC Free Response #6d. 2011 Calculus AB Free Response #1a. 2011 Calculus AB Free Response #1 parts b c d. 2011 Calculus AB Free Response #2 (a & b). 2011 Calculus AB Free Response #2 (c & d). 2011 Calculus AB Free Response #3 (a & b). 2011 Calculus AB Free Response #3 (c). 2011 Calculus AB Free Response #4a. 2011 Calculus AB Free Response #4b. 2011 Calculus AB Free Response #4c. 2011 Calculus AB Free Response #4d. 2011 Calculus AB Free Response #5a. 2011 Calculus AB Free Response #5b. 2011 Calculus AB Free Response #5c.. 2011 Calculus AB Free Response #6a. 2011 Calculus AB Free Response #6b. 2011 Calculus AB Free Response #6c. AP Calculus BC Exams: 2008 1 a. AP Calculus BC Exams: 2008 1 b&c. AP Calculus BC Exams: 2008 1 c&d. AP Calculus BC Exams: 2008 1 d. Calculus BC 2008 2 a. Calculus BC 2008 2 b &c. Calculus BC 2008 2d. 2011 Calculus BC Free Response #1a. 2011 Calculus BC Free Response #1 (b & c). 2011 Calculus BC Free Response #1d. 2011 Calculus BC Free Response #3a. 2011 Calculus BC Free Response #3 (b & c). 2011 Calculus BC Free Response #6a. 2011 Calculus BC Free Response #6b. 2011 Calculus BC Free Response #6c. 2011 Calculus BC Free Response #6d.

Minima, maxima, and critical points. Rates of change. Optimization. Rates of change. L'Hopital's rule. Mean value theorem. Minima, maxima and critical points. Testing critical points for local extrema. Identifying minima and maxima for x^3 - 12x - 5. Concavity, concave upwards and concave downwards intervals. Recognizing concavity exercise. Recognizing concavity. Inflection points. Graphing using derivatives. Another example graphing with derivatives. Minimizing sum of squares. Optimizing box volume graphically. Optimizing box volume analytically. Optimizing profit at a shoe factory. Minimizing the cost of a storage container. Expression for combined area of triangle and square. Minimizing combined area. Rates of change between radius and area of circle. Rate of change of balloon height. Related rates of water pouring into cone. Falling ladder related rates. Rate of change of distance between approaching cars. Speed of shadow of diving bird. Mean Value Theorem. Introduction to L'H

Divergence theorem intuition. Divergence theorem examples and proofs. Types of regions in 3D. 3-D Divergence Theorem Intuition. Divergence Theorem Example 1. Why we got zero flux in Divergence Theorem Example 1. Type I Regions in Three Dimensions. Type II Regions in Three Dimensions. Type III Regions in Three Dimensions. Divergence Theorem Proof (part 1). Divergence Theorem Proof (part 2). Divergence Theorem Proof (part 3). Divergence Theorem Proof (part 4). Divergence Theorem Proof (part 5). 3-D Divergence Theorem Intuition. Divergence Theorem Example 1. Why we got zero flux in Divergence Theorem Example 1. Type I Regions in Three Dimensions. Type II Regions in Three Dimensions. Type III Regions in Three Dimensions. Divergence Theorem Proof (part 1). Divergence Theorem Proof (part 2). Divergence Theorem Proof (part 3). Divergence Theorem Proof (part 4). Divergence Theorem Proof (part 5).

Volume under a surface with double integrals. Triple integrals as well. Double Integral 1. Double Integrals 2. Double Integrals 3. Double Integrals 4. Double Integrals 5. Double Integrals 6. Triple Integrals 1. Triple Integrals 2. Triple Integrals 3. Double Integral 1. Double Integrals 2. Double Integrals 3. Double Integrals 4. Double Integrals 5. Double Integrals 6. Triple Integrals 1. Triple Integrals 2. Triple Integrals 3.

Indefinite integral as anti-derivative. Definite integral as area under a curve. Integration by parts. U-substitution. Trig substitution. Antiderivatives and indefinite integrals. Indefinite integrals of x raised to a power. Antiderivative of hairier expression. Basic trig and exponential antiderivatives. Antiderivative of x^-1. Simple Riemann approximation using rectangles. Generalizing a left Riemann sum with equally spaced rectangles. Rectangular and trapezoidal Riemann approximations. Trapezoidal approximation of area under curve. Riemann sums and integrals. Deriving integration by parts formula. Antiderivative of xcosx using integration by parts. Integral of ln x. Integration by parts twice for antiderivative of (x^2)(e^x). Integration by parts of (e^x)(cos x). U-substitution. U-substitution example 2. U-substitution Example 3. U-substitution with ln(x). Doing u-substitution twice (second time with w). U-substitution and back substitution. U-substitution with definite integral. (2^ln x)/x Antiderivative Example. Another u-substitution example. Riemann sums and integrals. Intuition for Second Fundamental Theorem of Calculus. Evaluating simple definite integral. Definite integrals and negative area. Area between curves. Area between curves with multiple boundaries. Challenging definite integration. Introduction to definite integrals. Definite integrals (part II). Definite Integrals (area under a curve) (part III). Definite Integrals (part 4). Definite Integrals (part 5). Definite integral with substitution. Introduction to trig substitution. Another substitution with x=sin (theta). Integrals: Trig Substitution 1. Trig and U substitution together (part 1). Trig and U substitution together (part 2). Trig substitution with tangent. Integrals: Trig Substitution 2. Integrals: Trig Substitution 3 (long problem). Fundamental theorem of calculus. Applying the fundamental theorem of calculus. Swapping the bounds for definite integral. Both bounds being a function of x. Proof of Fundamental Theorem of Calculus. Connecting the first and second fundamental theorems of calculus. Introduction to improper integrals. Improper integral with two infinite bounds. Divergent improper integral. Antiderivatives and indefinite integrals. Indefinite integrals of x raised to a power. Antiderivative of hairier expression. Basic trig and exponential antiderivatives. Antiderivative of x^-1. Simple Riemann approximation using rectangles. Generalizing a left Riemann sum with equally spaced rectangles. Rectangular and trapezoidal Riemann approximations. Trapezoidal approximation of area under curve. Riemann sums and integrals. Deriving integration by parts formula. Antiderivative of xcosx using integration by parts. Integral of ln x. Integration by parts twice for antiderivative of (x^2)(e^x). Integration by parts of (e^x)(cos x). U-substitution. U-substitution example 2. U-substitution Example 3. U-substitution with ln(x). Doing u-substitution twice (second time with w). U-substitution and back substitution. U-substitution with definite integral. (2^ln x)/x Antiderivative Example. Another u-substitution example. Riemann sums and integrals. Intuition for Second Fundamental Theorem of Calculus. Evaluating simple definite integral. Definite integrals and negative area. Area between curves. Area between curves with multiple boundaries. Challenging definite integration. Introduction to definite integrals. Definite integrals (part II). Definite Integrals (area under a curve) (part III). Definite Integrals (part 4). Definite Integrals (part 5). Definite integral with substitution. Introduction to trig substitution. Another substitution with x=sin (theta). Integrals: Trig Substitution 1. Trig and U substitution together (part 1). Trig and U substitution together (part 2). Trig substitution with tangent. Integrals: Trig Substitution 2. Integrals: Trig Substitution 3 (long problem). Fundamental theorem of calculus. Applying the fundamental theorem of calculus. Swapping the bounds for definite integral. Both bounds being a function of x. Proof of Fundamental Theorem of Calculus. Connecting the first and second fundamental theorems of calculus. Introduction to improper integrals. Improper integral with two infinite bounds. Divergent improper integral.