# Content Update: February 2018 (US Government, Biology, Stats, Careers and more!)

This month we added a ton of new AP US Government, High School Biology, Statistics, Career content, and more! Check it all out below and learn what it takes to be a Yacht Captain or Veterinarian.

Domain | Subject | Title | Content kind | URL |

Arts and humanities | AP US Government and Politics | Challenges of the Articles of Confederation | Exercise | |

Arts and humanities | AP US Government and Politics | Lesson summary: challenges of the Articles of Confederation | Article | |

Arts and humanities | AP US Government and Politics | Constitutional interpretations of federalism | Exercise | |

Arts and humanities | AP US Government and Politics | McCulloch v. Maryland (1819) | Article | |

Arts and humanities | AP US Government and Politics | US v. Lopez (1995) | Article | |

Arts and humanities | AP US Government and Politics | Lesson summary: Constitutional interpretations of federalism | Article | |

Arts and humanities | AP US Government and Politics | Enumerated and implied powers of the US federal government | Video | |

Arts and humanities | AP US Government and Politics | McCulloch v. Maryland | Video | |

Arts and humanities | AP US Government and Politics | Federal and state powers and the 10th and 14th Amendments | Video | |

Arts and humanities | AP US Government and Politics | Unites States v. Lopez | Video | |

Arts and humanities | AP US Government and Politics | Foundations of American democracy unit review | Article | |

Arts and humanities | AP US Government and Politics | Federalism in action | Exercise | |

Arts and humanities | AP US Government and Politics | Introduction to the public policy process | Video | |

Arts and humanities | AP US Government and Politics | Government power and individual rights | Exercise | |

Arts and humanities | AP US Government and Politics | Lesson summary: government power and individual rights | Article | |

Arts and humanities | AP US Government and Politics | Federalist Papers #10 (part 1) | Video | |

Arts and humanities | AP US Government and Politics | Anti Federalists and Brutus I | Video | |

Arts and humanities | AP US Government and Politics | Federalist Papers #10 (part 2) | Video | |

Arts and humanities | AP US Government and Politics | The Preamble to the Constitution | Video | |

Arts and humanities | AP US Government and Politics | Ideals of democracy | Exercise | |

Arts and humanities | AP US Government and Politics | Lesson summary: ideals of democracy | Article | |

Arts and humanities | AP US Government and Politics | The ideas at the heart of US government | Article | |

Arts and humanities | AP US Government and Politics | Principles of American government | Article | |

Arts and humanities | AP US Government and Politics | Principles of American government | Exercise | |

Arts and humanities | AP US Government and Politics | Lesson summary: principles of American government | Article | |

Arts and humanities | AP US Government and Politics | Impeachment | Video | |

Arts and humanities | AP US Government and Politics | Multiple points of influence due to separation of powers and checks and balances | Video | |

Arts and humanities | AP US Government and Politics | Article V and the amendment process | Article | |

Arts and humanities | AP US Government and Politics | Lesson summary: ratification of the US Constitution | Article | |

Arts and humanities | AP US Government and Politics | The impact of Constitutional compromises on us today | Video | |

Arts and humanities | AP US Government and Politics | Relationship between the states and the federal government | Article | |

Arts and humanities | AP US Government and Politics | The relationship between the states and the federal government | Exercise | |

Arts and humanities | AP US Government and Politics | Lesson summary: the relationship between the states and the federal government | Article | |

Arts and humanities | AP US Government and Politics | Federalism in the United States | Video | |

Arts and humanities | AP US Government and Politics | Types of democracy | Article | |

Arts and humanities | AP US Government and Politics | Lesson summary: types of democracy | Article | |

Arts and humanities | AP US Government and Politics | Types of democracy | Exercise | |

Arts and humanities | AP US Government and Politics | Article I of the Constitution | Video | |

Arts and humanities | AP US Government and Politics | Congress: The Senate and the House of Representatives | Exercise | |

Arts and humanities | AP US Government and Politics | Congressional behavior | Exercise | |

Arts and humanities | AP US Government and Politics | Representatives as delegates, trustees and politicos | Video | |

Arts and humanities | AP US Government and Politics | Gerrymandering | Video | |

Arts and humanities | AP US Government and Politics | Article II of the Constitution | Video | |

Arts and humanities | AP US Government and Politics | Presidential signing statements | Video | |

Arts and humanities | AP US Government and Politics | Executive orders | Video | |

Arts and humanities | AP US Government and Politics | Formal and informal powers of the US President | Video | |

Arts and humanities | AP US Government and Politics | Lesson summary: Roles and powers of the president | Article | |

Arts and humanities | AP US Government and Politics | Roles and powers of the president | Exercise | |

Arts and humanities | AP US Government and Politics | Structures, powers, and functions of Congress | Exercise | |

Arts and humanities | AP US Government and Politics | How a bill becomes a law | Video | |

Arts and humanities | AP US Government and Politics | Senate filibusters, unanimous consent and cloture | Video | |

Arts and humanities | AP US Government and Politics | Discretionary and mandatory outlays of the US federal government | Video | |

Arts and humanities | AP US Government and Politics | Earmarks, pork barrel projects and logrolling | Video | |

Arts and humanities | AP US Government and Politics | The House of Represenatives in comparison to the Senate | Video | |

Arts and humanities | AP US Government and Politics | Article III of the Constitution | Video | |

Arts and humanities | AP US Government and Politics | The judicial branch | Exercise | |

Arts and humanities | Art history basics | Light and Shadow | Video | |

Arts and humanities | Art of the Americas to World War I | Pride and anxiety in New Spain: Francisco Clapera, set of sixteen Casta paintings, c. 1775 | Video | |

Arts and humanities | Modernisms 1900-1980 | When the department store was new: Elizabeth Sparhawk-Jones, The Shoe Shop | Video | |

Arts and humanities | Special topics in art history | Scientific research glossary of terms | Video | |

College, careers, and more | Careers | Commercial real estate advisor: How I got my job and where I'm going | Video | |

College, careers, and more | Careers | Commercial real estate advisor: What I do and how much I make | Video | |

College, careers, and more | Careers | Commercial real estate advisor: My budget and planning for the future | Video | |

College, careers, and more | Careers | Outdoor education professional: Working as an outdoor educator | Video | |

College, careers, and more | Careers | Outdoor education professional: My budget and planning for the future | Video | |

College, careers, and more | Careers | Outdoor education professional: Requirements to become an outdoor educator | Video | |

College, careers, and more | Careers | Outdoor education professional: How I got my job and where I'm going | Video | |

College, careers, and more | Careers | Outdoor education professional: What I do and how much I make | Video | |

College, careers, and more | Careers | Outdoor education professional: Making ends meet as an outdoor educator | Video | |

College, careers, and more | Careers | Veterinarian: How I got my job and where I'm going | Video | |

College, careers, and more | Careers | Veterinarian: What I do and how much I make | Video | |

College, careers, and more | Careers | Veterinarian: My budget and planning for the future | Video | |

College, careers, and more | Careers | Yacht captain: My budget and planning for the future | Video | |

College, careers, and more | Careers | Yacht captain: What I do and how much I make | Video | |

College, careers, and more | Careers | Yacht caption: How I got my job and where I'm going | Video | |

Economics and finance | AP Macroeconomics | Limitations of GDP | Video | |

Economics and finance | AP Macroeconomics | Expenditure approach to calculating GDP examples | Video | |

Economics and finance | AP Macroeconomics | Natural, cyclical, structural and frictional unemployment rates | Video | |

Math | 8th grade | Determine rotations (basic) | Exercise | |

Math | 8th grade | Rotate points (basic) | Exercise | |

Math | Multivariable calculus | Derivatives of multivariable functions review practice | Exercise | |

Math | Multivariable calculus | Thinking about multivariable functions review practice | Exercise | |

Math | Statistics and probability | Making a t interval for paired data | Article | |

Math | Statistics and probability | Interpreting a confidence interval for a mean | Article | |

Math | Statistics and probability | Conditions for valid t intervals | Video | |

Math | Statistics and probability | Example finding critical t value | Video | |

Math | Statistics and probability | Example constructing a t interval for a mean | Video | |

Math | Statistics and probability | Confidence interval for a mean with paired data | Video | |

Math | Statistics and probability | Introduction to t statistics | Video | |

Math | Statistics and probability | Simulation showing value of t statistic | Video | |

Math | Statistics and probability | Sample size for a given margin of error for a mean | Video | |

Math | Statistics and probability | Conditions for a t interval for a mean | Exercise | |

Math | Statistics and probability | Finding the critical value t* for a desired confidence level | Exercise | |

Math | Statistics and probability | Calculating a t interval for a mean | Exercise | |

Math | Statistics and probability | Sample size and margin of error in a confidence interval for a mean | Exercise | |

Math | Statistics and probability | Reference: Conditions for inference on a mean | Article | |

Math | Statistics and probability | Error probabilities and power | Exercise | |

Math | Statistics and probability | Type I vs Type II error | Exercise | |

Math | Statistics and probability | Examples identifying Type I and Type II errors | Video | |

Math | Statistics and probability | Introduction to Type I and Type II errors | Video | |

Math | Statistics and probability | Introduction to power in significance tests | Video | |

Math | Statistics and probability | Examples thinking about power in significance tests | Video | |

Math | Statistics and probability | Conditions for a t test about a mean | Exercise | |

Math | Statistics and probability | Writing hypotheses for a test about a mean | Exercise | |

Math | Statistics and probability | Calculating the test statistic in a t test for a mean | Exercise | |

Math | Statistics and probability | Making conclusions in a t test for a mean | Exercise | |

Math | Statistics and probability | Calculating the P-value in a t test for a mean | Exercise | |

Math | Statistics and probability | Example calculating t statistic for a test about a mean | Video | |

Math | Statistics and probability | Comparing P-value from t statistic to significance level | Video | |

Math | Statistics and probability | Free response example: Significance test for a mean | Video | |

Math | Statistics and probability | Writing hypotheses for a significance test about a mean | Video | |

Math | Statistics and probability | Using TI calculator for P-value from t statistic | Video | |

Math | Statistics and probability | Using a table to estimate P-value from t statistic | Video | |

Math | Statistics and probability | When to use z or t statistics in significance tests | Video | |

Math | Statistics and probability | Conditions for a t test about a mean | Video | |

Math | Statistics and probability | Writing hypotheses for a test about a proportion | Exercise | |

Math | Statistics and probability | Conditions for a z test about a proportion | Exercise | |

Math | Statistics and probability | Calculating the test statistic in a z test for a proportion | Exercise | |

Math | Statistics and probability | Calculating the P-value in a z test for a proportion | Exercise | |

Math | Statistics and probability | Making conclusions in a z test for a proportion | Exercise | |

Math | Statistics and probability | Calculating a z statistic in a test about a proportion | Video | |

Math | Statistics and probability | Calculating a P-value given a z statistic | Video | |

Math | Statistics and probability | Constructing hypotheses for a significance test about a proportion | Video | |

Math | Statistics and probability | Making conclusions in a test about a proportion | Video | |

Math | Statistics and probability | Conditions for a z test about a proportion | Video | |

Math | Statistics and probability | Writing null and alternative hypotheses | Exercise | |

Math | Statistics and probability | Using P-values to make conclusions | Article | |

Math | Statistics and probability | Estimating P-values from simulations | Exercise | |

Math | Statistics and probability | Estimating a P-value from a simulation | Video | |

Math | Statistics and probability | Examples of null and alternative hypotheses | Video | |

Math | Statistics and probability | P-values and significance tests | Video | |

Math | Statistics and probability | Comparing P-values to different significance levels | Video | |

Partner content | The National Constitution Center | Article VI of the Constitution | Video | |

Partner content | The National Constitution Center | Article IV of the Constitution | Video | |

Partner content | The National Constitution Center | Article V of the Constitution | Video | |

Science | High school biology | Introduction to the cell | Video | |

Science | High school biology | Introduction to cilia, flagella and pseudopodia | Video | |

Science | High school biology | Basic cell structures | Exercise | |

Science | High school biology | Identifying cell structures | Exercise | |

Science | High school biology | Eukaryotic cell structures | Article | |

Science | High school biology | Organelles in eukaryotic cells | Video | |

Science | High school biology | Eukaryotic cell structures | Exercise | |

Science | High school biology | Identifying eukaryotic cell structures | Exercise | |

Science | High school biology | Intro to cells | Exercise | |

Science | High school biology | Plant vs animal cells | Exercise | |

Science | High school biology | Plant vs animal cells | Article | |

Science | High school biology | Prokaryotes and eukaryotes | Exercise | |

Science | High school biology | Prokaryotes and eukaryotes | Article | |

Science | High school biology | Introduction to passive and active transport | Video | |

Science | High school biology | Active transport | Exercise | |

Science | High school biology | Passive transport | Exercise | |

Science | High school biology | Passive transport | Article | |

Science | High school biology | The cell membrane | Exercise | |

Science | High school biology | Biological macromolecules | Article | |

Science | High school biology | Biological macromolecules | Exercise | |

Science | High school biology | Introduction to pH | Video | |

Science | High school biology | pH, acids, and bases | Exercise | |

Science | High school biology | pH, acids, and bases | Article | |

Science | High school biology | Introduction to vitamins and minerals | Video | |

Science | High school biology | Vitamins and minerals | Exercise | |

Science | High school biology | Vitamins and minerals | Article | |

Science | High school biology | Water and life | Exercise | |

Science | High school biology | Water and life | Article | |

Science | High school biology | Enzymes | Exercise | |

Science | High school biology | Introduction to metabolism | Exercise | |

Science | High school biology | Photosynthesis | Exercise | |

Science | High school biology | Cellular respiration | Exercise | |

Science | High school biology | Body structure and homeostasis | Article | |

Science | High school biology | The circulatory system | Article | |

Science | High school biology | The respiratory system | Article | |

Science | High school biology | The circulatory and respiratory systems | Exercise | |

Science | High school biology | Chromosome structure and numbers | Article | |

Science | High school biology | Human fertilization and early development | Video | |

Science | High school biology | Fertilization and development | Article | |

Science | High school biology | Fertilization and development | Exercise | |

Science | High school biology | Meiosis | Article | |

Science | High school biology | The cell cycle and mitosis | Article | |

Science | High school biology | The cell cycle and mitosis | Exercise | |

Science | High school biology | Types of reproduction | Article | |

Science | High school biology | Types of reproduction | Exercise |

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