Content Update: July 2018 (ask the Big Questions with new Philosophy content... and more!)

What is Chance? Do any of us really know? Consider these and other life questions with all the new partner content videos added to Khan Academy last month from Wireless Philosophy.

And after you've figured those out, you can enjoy the Science, Math, Stats, and Government content that the team also added. Carpe diem!

Domain	Subject	Content kind	Title	URL
Arts and humanities	AP US Government and Politics	Video	State checks on the judicial branch	http://www.khanacademy.org/humanities/ap-us-government-and-politics/interactions-among-branches-of-government/checks-on-the-judicial-branch/v/state-checks-on-the-judicial-branch
Arts and humanities	AP US Government and Politics	Video	Senate confirmation as a check on the judicial branch	http://www.khanacademy.org/humanities/ap-us-government-and-politics/interactions-among-branches-of-government/checks-on-the-judicial-branch/v/senate-confirmation-hearings-for-justices
Arts and humanities	AP US Government and Politics	Article	Present-day constitutional issues	http://www.khanacademy.org/humanities/ap-us-government-and-politics/foundations-of-american-democracy/ratification-of-the-us-constitution/a/present-day-constitutional-issues
Arts and humanities	AP US Government and Politics	Video	Cost and duration of modern campaigns	http://www.khanacademy.org/humanities/ap-us-government-and-politics/political-participation/modern-campaigns/v/cost-and-duration-of-modern-campaigns
Arts and humanities	AP US Government and Politics	Article	EU coverage by unit	http://www.khanacademy.org/humanities/ap-us-government-and-politics/introduction-to-this-ap-us-government-and-politics/for-teachers-ap-us-government-and-politics-curriculum-correlation/a/eu-coverage-by-unit
Arts and humanities	AP US Government and Politics	Article	Lesson summary: changing media	http://www.khanacademy.org/humanities/ap-us-government-and-politics/political-participation/changing-media/a/lesson-summary-changing-media
Arts and humanities	AP US Government and Politics	Article	AP US Government and Politics curriculum mapping guide	http://www.khanacademy.org/humanities/ap-us-government-and-politics/introduction-to-this-ap-us-government-and-politics/for-teachers-ap-us-government-and-politics-curriculum-correlation/a/ap-us-government-and-politics-curriculum-mapping-guide
Arts and humanities	AP US Government and Politics	Article	Unit 1: curriculum mapping by LO and EK	http://www.khanacademy.org/humanities/ap-us-government-and-politics/introduction-to-this-ap-us-government-and-politics/for-teachers-ap-us-government-and-politics-curriculum-correlation/a/unit-1-curriculum-mapping-by-lo-and-ek
Arts and humanities	AP US Government and Politics	Article	Unit 2: curriculum mapping by LO and EK	http://www.khanacademy.org/humanities/ap-us-government-and-politics/introduction-to-this-ap-us-government-and-politics/for-teachers-ap-us-government-and-politics-curriculum-correlation/a/unit-2-curriculum-mapping-by-lo-and-ek
Arts and humanities	AP US Government and Politics	Article	Unit 3: curriculum mapping by LO and EK	http://www.khanacademy.org/humanities/ap-us-government-and-politics/introduction-to-this-ap-us-government-and-politics/for-teachers-ap-us-government-and-politics-curriculum-correlation/a/unit-3-curriculum-mapping-by-lo-and-ek
Arts and humanities	AP US Government and Politics	Article	Unit 4: curriculum mapping by LO and EK	http://www.khanacademy.org/humanities/ap-us-government-and-politics/introduction-to-this-ap-us-government-and-politics/for-teachers-ap-us-government-and-politics-curriculum-correlation/a/unit-4-curriculum-mapping-by-lo-and-ek
Arts and humanities	AP US Government and Politics	Article	Unit 5: curriculum mapping by LO and EK	http://www.khanacademy.org/humanities/ap-us-government-and-politics/introduction-to-this-ap-us-government-and-politics/for-teachers-ap-us-government-and-politics-curriculum-correlation/a/unit-5-curriculum-mapping-by-lo-and-ek
Arts and humanities	AP US Government and Politics	Exercise	Changing media	http://www.khanacademy.org/humanities/ap-us-government-and-politics/political-participation/changing-media/e/changing-media
Arts and humanities	Modernisms 1900-1980	Video	Warhol, Coca-Cola [3]	http://www.khanacademy.org/humanities/art-1010/pop/v/warhol-coca-cola
Arts and humanities	Special topics in art history	Article	The rediscovery of Pompeii and the other cities of Vesuvius	http://www.khanacademy.org/humanities/special-topics-art-history/arches-at-risk-cultural-heritage-education-series/the-role-of-archaeology/a/the-rediscovery-of-pompeii-and-the-other-cities-of-vesuvius
College, careers, and more	Careers	Video	Licensed clinical social worker: How I got my job and where I'm going	http://www.khanacademy.org/college-careers-more/career-content/support-health-and-wellness/licensed-clinical-social-worker/v/social-worker-how-i-got-my-job-where-im-going-khan-academy
College, careers, and more	Careers	Video	Licensed clinical social worker: What I do and how much I make	http://www.khanacademy.org/college-careers-more/career-content/support-health-and-wellness/licensed-clinical-social-worker/v/social-worker-what-i-do-how-much-i-make-khan-academy
College, careers, and more	Careers	Video	Licensed clinical social worker: My budget and planning for the future	http://www.khanacademy.org/college-careers-more/career-content/support-health-and-wellness/licensed-clinical-social-worker/v/social-worker-my-budget-planning-for-the-future-khan-academy
Math	6th grade	Exercise	Equivalent ratios in the real world	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-ratios-prop-topic/cc-6th-ratios-intro/e/equivalent-ratios-in-the-real-world
Math	6th grade	Exercise	Equivalent ratio word problems (basic)	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-ratios-prop-topic/cc-6th-ratios-intro/e/equivalent-ratio-word-problems--basic-
Math	6th grade	Exercise	Create double number lines	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-ratios-prop-topic/visualize-ratios/e/create-double-number-lines
Math	6th grade	Exercise	Relate double numbers lines and ratio tables	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-ratios-prop-topic/visualize-ratios/e/relate-double-numbers-lines-and-ratio-tables
Math	6th grade	Exercise	Convert fractions to percents	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-ratios-prop-topic/cc-6th-percent-decimal-conversions/e/converting-fraction-to-percents
Math	6th grade	Exercise	Graphing basic inequalities	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-inequalities/e/graphs-of-inequalities
Math	6th grade	Exercise	Estimate center using dot plots	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/dot-plot/e/estimate-center-using-dot-plots
Math	6th grade	Exercise	Create equivalent expressions by factoring	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-distributive-property/e/create-equivalent-expressions-by-factoring
Math	6th grade	Exercise	Order of operations (no exponents)	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-arithmetic-operations/cc-6th-order-of-operations/e/order-of-operations--no-exponents-
Math	6th grade	Exercise	Interpreting negative numbers (temperature and elevation)	http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-negative-number-topic/cc-6th-neg-num-intro/e/interpreting-negative-numbers--temperature-and-elevation-
Math	8th grade	Exercise	Evaluate functions	http://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-functions-and-function-notation/e/evaluate-functions
Math	8th grade	Exercise	Evaluate functions from their graph	http://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-functions-and-function-notation/e/evaluate-functions-from-graph
Math	8th grade	Exercise	Linear equations word problems	http://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-linear-functions-modeling/e/linear-equations-word-problems
Math	8th grade	Exercise	Writing linear functions word problems	http://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/constructing-linear-models-real-world/e/writing-linear-functions-word-problems
Math	8th grade	Exercise	Function rules from equations	http://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-functions-and-function-notation/e/function-rules-from-equations
Math	AP Statistics	Exercise	Observational studies versus experiments	http://www.khanacademy.org/math/ap-statistics/gathering-data-ap/types-of-studies-experimental-vs-observational/e/obs-studies-vs-experiments
Math	AP Statistics	Video	Classifying shapes of distributions	http://www.khanacademy.org/math/ap-statistics/quantitative-data-ap/describing-comparing-distributions/v/classifying-distributions
Math	AP Statistics	Video	Z-score introduction	http://www.khanacademy.org/math/ap-statistics/density-curves-normal-distribution-ap/measuring-position/v/z-score-introduction
Math	AP Statistics	Exercise	Estimating mean and median in data displays	http://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/mean-median-more/e/estimating-mean-median-displays
Math	AP Statistics	Exercise	Sample standard deviation	http://www.khanacademy.org/math/ap-statistics/summarizing-quantitative-data-ap/measuring-spread-quantitative/e/sample-standard-deviation
Math	AP Statistics	Video	Standard deviation of residuals or root mean square deviation (RMSD)	http://www.khanacademy.org/math/ap-statistics/bivariate-data-ap/assessing-fit-least-squares-regression/v/standard-dev-residuals
Math	AP Statistics	Video	Introduction to residuals and least-squares regression	http://www.khanacademy.org/math/ap-statistics/bivariate-data-ap/least-squares-regression/v/regression-residual-intro
Math	AP Statistics	Exercise	Finding errors in study conclusions	http://www.khanacademy.org/math/ap-statistics/gathering-data-ap/statistics-experiments/e/issues-experiments
Math	Class 10 math (India)	Video	Finding trigonometric ratios of complementary angles (worked examples)	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-8-introduction-to-trigonometrics/in-in-class-10-trigo-sine-and-cosine-of-complementary-angles/v/worked-examples-trigonometric-ratios-of-complementary-angles
Math	Class 10 math (India)	Video	Intro to Pythagorean trigonometric identities	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-8-introduction-to-trigonometrics/in-in-trigonometric-identities/v/intro-to-pythagorean-trigonometric-identities
Math	Class 10 math (India)	Video	Trigonometric identity example proof involving sin, cos, and tan	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-8-introduction-to-trigonometrics/in-in-trigonometric-identities/v/example-2-proving-trigonometric-identities
Math	Class 10 math (India)	Video	Trigonometric identity example proof involving all the six ratios	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-8-introduction-to-trigonometrics/in-in-trigonometric-identities/v/example-3-proving-trigonometric-identities
Math	Class 10 math (India)	Video	Converting between trigonometric ratios example: write all ratios in terms of sine	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-8-introduction-to-trigonometrics/in-in-trigonometric-identities/v/writing-a-trigonometric-ratio-in-terms-other-ratios
Math	Class 10 math (India)	Video	Trigonometric identity example proof involving sec, sin, and cos	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-8-introduction-to-trigonometrics/in-in-trigonometric-identities/v/example-1-proving-trigonometric-identities
Math	Class 10 math (India)	Video	Heights and distances word problem: height of a cloud above a lake	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-9-some-applications-of-trigonometry/in-in-class-10-trigo-heights-and-distances/v/example-2-heights-and-distances
Math	Class 10 math (India)	Video	Heights and distances word problem: distance between two buildings	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-9-some-applications-of-trigonometry/in-in-class-10-trigo-heights-and-distances/v/example-1-heights-and-distances
Math	Class 10 math (India)	Exercise	Finding number of terms when sum of an arithmetic progression is given	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-5-arithmetic-progressions/in-in-class-10-ap-finite-arithmetic-series/e/finding-number-of-terms-when-sum-of-an-arithmetic-progression-is-given
Math	Class 10 math (India)	Exercise	Finding first term and common difference when sum is given	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-5-arithmetic-progressions/in-in-class-10-ap-finite-arithmetic-series/e/finding-missing-terms-of-an-arithmetic-progression
Math	Class 10 math (India)	Exercise	Word problems: Writing quadratic equations	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-4-quadratic-equation/word-problems-on-quadratic-equations/e/writing-quadratic-equations-word-problems
Math	Class 10 math (India)	Exercise	Identifying substitutions: Equations reducible to linear form	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-3-pair-of-linear-equations-in-two-variables/solving-equations-reducible-to-linear-form/e/identifying-substitutions--equations-reducible-to-linear-form
Math	Class 10 math (India)	Exercise	Word problems: Writing equations reducible to linear form	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-3-pair-of-linear-equations-in-two-variables/solving-equations-reducible-to-linear-form/e/word-problems--writing-equations-reducible-to-linear-form
Math	Class 10 math (India)	Exercise	Solving equations reducible to linear form	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-3-pair-of-linear-equations-in-two-variables/solving-equations-reducible-to-linear-form/e/solving-equations-reducible-to-linear-form
Math	Class 10 math (India)	Exercise	Area of combination of figures	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-12-area-related-to-circles/in-in-clas-10-area-of-circles-area-of-combination-of-figures/e/area-of-combination-of-figures
Math	Class 10 math (India)	Exercise	Area of a segment of a circle	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-12-area-related-to-circles/area-of-a-segment/e/finding-the-area-of-a-segment-of-a-circle
Math	Class 10 math (India)	Video	Intro to heights and distances	http://www.khanacademy.org/math/in-in-grade-10-ncert/in-in-chapter-9-some-applications-of-trigonometry/in-in-class-10-trigo-heights-and-distances/v/intro-to-heights-and-distances
Math	Integral Calculus	Exercise	Area between two polar curves	http://www.khanacademy.org/math/ap-calculus-bc/bc-advanced-functions-new/bc-9-9/e/area-between-two-polar-curves
Partner content	Wireless Philosophy	Video	Fallacies: Slippery Slope	http://www.khanacademy.org/partner-content/wi-phi/wiphi-critical-thinking/wiphi-fallacies/v/slippery-slope-critical-thinking-fallacies-wireless-philosophy
Partner content	Wireless Philosophy	Video	Fallacies: Red Herring	http://www.khanacademy.org/partner-content/wi-phi/wiphi-critical-thinking/wiphi-fallacies/v/red-herring-critical-thinking-fallacies-wireless-philosophy
Partner content	Wireless Philosophy	Video	Fundamentals: Correlation and Causation	http://www.khanacademy.org/partner-content/wi-phi/wiphi-critical-thinking/wiphi-fundamentals/v/critical-thinking-fundamentals-correlation-and-causation
Partner content	Wireless Philosophy	Video	Epistemology: Virtue Epistemology	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-epistemology/v/philosophy-epistemology-virtue-epistemology-hd
Partner content	Wireless Philosophy	Video	Epistemology: The Preface Paradox	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-epistemology/v/philosophy-epistemology-the-preface-paradox
Partner content	Wireless Philosophy	Video	Epistemology: The Value of Knowledge	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-epistemology/v/philosophy-epistemology-the-value-of-knowledge-hd
Partner content	Wireless Philosophy	Video	Metaphilosophy: Contrastivism #1 (Introduction)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/metaphilosophy/v/philosophy-language-contrastivism-1-introduction
Partner content	Wireless Philosophy	Video	Metaphilosophy: Contrastivism #3 (Causation)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/metaphilosophy/v/philosophy-language-contrastivism-3-causation
Partner content	Wireless Philosophy	Video	Metaphilosophy: Contrastivism #4 (Skepticism)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/metaphilosophy/v/philosophy-language-contrastivism-4-skepticism
Partner content	Wireless Philosophy	Video	Metaphilosophy: Contrastivism #5 (Knowledge)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/metaphilosophy/v/philosophy-language-contrastivism-5-knowledge
Partner content	Wireless Philosophy	Video	Metaphilosophy: Contrastivism #2 (Free Will)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/metaphilosophy/v/philosophy-language-contrastivism-2-free-will
Partner content	Wireless Philosophy	Video	Metaphysics: Emergence	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-metaphysics/v/philosophy-metaphysics-emergence
Partner content	Wireless Philosophy	Video	Bertrand's Paradox	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/probability-philosophy/v/bertrands-paradox-probability-wireless-philosophy
Partner content	Wireless Philosophy	Video	Religion: Pascal's Wager	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-religion/v/philosophy-religion-pascals-wager
Partner content	Wireless Philosophy	Video	Theory of Knowledge: Intuition	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-theory-of-knowledge/v/intuition-epistemology-wireless-philosophy
Partner content	Wireless Philosophy	Video	Theory of Knowledge: Contextualism	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-theory-of-knowledge/v/philosophy-epistemology-contextualism-hd
Partner content	Wireless Philosophy	Video	Ethics: Symmetry Argument Against the Badness of Death	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/wiphi-ethics/v/symmetry-argument-against-the-badness-of-death-ethics-wireless-philosophy
Partner content	Wireless Philosophy	Video	Ethics: Know Thyself #1 (The Examined Life)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/wiphi-ethics/v/the-examined-life-know-thyself-1-wireless-philosophy
Partner content	Wireless Philosophy	Video	Political: Why Vote? Reasons to Vote	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/wiphi-political/v/philosophy-political-why-vote-reasons-to-vote
Partner content	Wireless Philosophy	Video	Race: Racial Ontology #3a (Sociohistorical Theories of Race)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/race-philosophy/v/philosophy-race-racial-ontology-3a-sociohistorical-theories-of-race
Partner content	Wireless Philosophy	Video	Race: Racial Ontology #3b (Sociohistorical Theories of Race)	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/race-philosophy/v/philosophy-race-racial-ontology-3b-sociohistorical-theories-of-race
Partner content	Wireless Philosophy	Video	Epistemology: The Epistemic Regress Problem	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/wiphi-epistemology/v/the-epistemic-regress-problem-epistemology-wireless-philosophy
Partner content	Wireless Philosophy	Video	What is Chance?	http://www.khanacademy.org/partner-content/wi-phi/wiphi-metaphysics-epistemology/probability-philosophy/v/what-is-chance-probability-wireless-philosophy
Partner content	Wireless Philosophy	Video	Ethics: Promising Against the Evidence #2	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/wiphi-ethics/v/promising-against-the-evidence-2-ethics-philosophy
Partner content	Wireless Philosophy	Video	Ethics: Promising Against the Evidence #1	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/wiphi-ethics/v/promising-against-the-evidence-1-ethics-philosophy
Partner content	Wireless Philosophy	Video	Political: Should We Have Children?	http://www.khanacademy.org/partner-content/wi-phi/wiphi-value-theory/wiphi-political/v/should-we-have-children-political-wireless-philosophy-corrected-version
Science	AP Physics 1	Exercise	Forces and kinematics	http://www.khanacademy.org/science/ap-physics-1/prepare-for-the-ap-physics-1-exam/ap-physics-1-advanced-practice/e/forces-and-kinematics
Science	AP Physics 1	Exercise	Momentum Conservation Graphs	http://www.khanacademy.org/science/ap-physics-1/prepare-for-the-ap-physics-1-exam/ap-physics-1-advanced-practice/e/momentum-conservation-graphs
Science	High school biology	Exercise	Codons and mutations	http://www.khanacademy.org/science/high-school-biology/hs-molecular-genetics/hs-rna-and-protein-synthesis/e/hs-mutations
Science	High school biology	Exercise	Punnett squares and probability	http://www.khanacademy.org/science/high-school-biology/hs-classical-genetics/hs-introduction-to-heredity/e/hs-punnett-squares
Science	High school biology	Article	Population ecology review	http://www.khanacademy.org/science/high-school-biology/hs-ecology/hs-population-ecology/a/hs-population-ecology-review
Science	High school biology	Exercise	Experimental design and bias	http://www.khanacademy.org/science/high-school-biology/hs-biology-foundations/hs-biology-and-the-scientific-method/e/hs-experimental-design-and-bias
Science	High school biology	Video	Data to justify experimental claims examples	http://www.khanacademy.org/science/high-school-biology/hs-biology-foundations/hs-biology-and-the-scientific-method/v/data-to-justify-experimental-claims-examples
Science	High school biology	Video	Pedigrees	http://www.khanacademy.org/science/high-school-biology/hs-classical-genetics/hs-pedigrees/v/pedigrees
Science	High school biology	Video	Molecular evidence for evolutionary relationships examples	http://www.khanacademy.org/science/high-school-biology/hs-evolution/hs-evidence-of-evolution/v/molecular-evidence-for-evolutionary-relationships-examples

Regina Litman

22:39 Ngày 09 tháng 08 năm 2018

As always, thank for this information. With the removal of the counts of articles and videos not yet read/viewed in the new Mastery system, the easiest way we’ll have to find out what’s new in areas we’d already finished is to look at these monthly updates. I see that there is some new content in AP Statistics, which is the course I’m doing now. I’d already discovered some of these in areas I thought I had already finished and am catching up with them now. (Incidentally, all or some of this new AP Statistics is not in the Android app yet.) Once I finish AP Statistics, or if I need a break from difficult new topics, I’ll go back inth 6th and 8th Grade Math and do the newly-added content.

Thanks again for these updates!

Content Update: July 2018 (ask the Big Questions with new Philosophy content... and more!)

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