arith231 Integer multiplication and division
arith067 Simplifying a fraction
arith212 Equivalent fractions
arith105 Signed fraction multiplication: Advanced
arith220 Decimal place value: Hundreds to ten thousandths
arith221 Rounding decimals
arith234 Signed decimal addition and subtraction with 3 numbers
arith030 Finding a percentage of a whole number without a calculator: Basic
arith047 Evaluating expressions with exponents: Problem type 1
arith049 Evaluating expressions with exponents: Problem type 2
arith042 Evaluating an expression with a negative exponent: Positive fraction base
alge024 Introduction to the product rule of exponents
alge026 Quotient of expressions involving exponents
arith602 Estimating a square root
arith601 Square root of a rational perfect square
alge080 Simplifying a radical expression with an even exponent
alge004 Evaluating a quadratic expression: Integers
alge606 Distributive property: Whole number coefficients
alge604 Distributive property: Integer coefficients
alge607 Combining like terms: Integer coefficients
alge663 Combining like terms: Advanced
alge160 Algebraic symbol manipulation
alge006 Solving a two-step equation with integers
alge200 Solving an equation to find the value of an expression
alge197 Graphing a line given its x- and y-intercepts
alge194 Graphing a line given its equation in slope-intercept form
alge195 Graphing a line given its equation in standard form
alge196 Graphing a line through a given point with a given slope
alge637 Determining the slope of a line given its graph
unit041 Volume of a cube or a rectangular prism
geom802 Circumference and area of a circle
unit841 Volume of a sphere
unit029 Volume of a cylinder

arith082 Multiplication of a decimal by a power of ten
arith083 Division of a decimal by a power of ten
scinot101 Converting between decimal numbers and numbers written in scientific notation
scinot102 Multiplying and dividing numbers written in scientific notation
scinot103 Calculating positive powers of scientific notation
scinot007 Finding negative powers of scientific notation
unit040 Identifying SI units
unit014 Interconversion of prefixed and base SI units
unit015 Interconversion of prefixed SI units
unit016 Interconverting compound SI units
unit038 Interconverting derived SI units
unit032 Interconverting temperatures in Celsius and Kelvins
unit033 Interconverting temperatures in Celsius and Fahrenheit
unit017 Adding and subtracting simple units
unit018 Multiplying and dividing simple units
unit019 Powers and roots of powers of simple units
unit020 Forming compound units
unit021 Adding and subtracting compound units
unit022 Multiplying and dividing compound units
unit023 Powers and roots of compound units
sigfig001 Counting significant digits
sigfig002 Rounding to a given significant digit
sigfig003 Counting significant digits when measurements are added or subtracted
sigfig004 Counting significant digits when measurements are multiplied or divided
sigfig005 Adding or subtracting and multiplying or dividing measurements

atom015 Distinguishing elements and compounds
atom016 Distinguishing compounds and mixtures
atom034 Distinguishing chemical and physical change
atom033 Distinguishing solid, liquid and gas phases of a pure substance
atom001 Names and symbols of important elements
atom002 Reading a Periodic Table entry
atom042 Understanding periods and groups of the Periodic Table
atom003 Organization of the Periodic Table
atom005 Standard chemical and physical states of the elements
atom038 Using the Periodic Table to identify similar elements
atom046 Understanding periodic trends in atomic size
atom047 Understanding periodic trends in atomic ionizability
thermo008 Interconverting calories and joules
thermo011 Calculating specific heat capacity
thermo009 Using specific heat capacity to find heat
thermo010 Using specific heat capacity to find temperature change
atom041 Understanding the organization of the electromagnetic spectrum

atom006 Counting protons and electrons in atoms and atomic ions
atom029 Finding isoprotonic atoms
atom030 Finding isoelectronic atoms
atom004 Isotopes
atom012 Predicting the ions formed by common main-group elements
atom019 Counting valence electrons in an atomic ion
atom020 Drawing the Lewis dot diagram of a main group atom or common atomic ion
atom048 Counting the electron shells in a neutral atom
atom021 Deducing the allowed quantum numbers of an atomic electron
atom024 Calculating the capacity of electron subshells
atom031 Knowing the subshells of an electron shell
atom025 Interpreting the electron configuration of an atom or atomic ion
atom026 Interpreting the electron configuration of an atom or atomic ion in noble-gas notation
atom027 Writing the electron configuration of an atom or atomic ion with s and p electrons only

stoich006 Counting the number of atoms in a formula unit
stoich007 Finding mole ratios from chemical formulae
stoich008 Finding chemical formulae from a mole ratio
stoich009 Finding molar mass from chemical formulae
stoich010 Finding mass percent from chemical formulae
stoich011 Elemental analysis
atom045 Understanding the prefixes used in naming binary compounds
atom014 Naming binary covalent compounds
atom017 Predicting whether a compound is ionic or molecular
atom007 Predicting the formula of binary ionic compounds
atom008 Naming binary ionic compounds
atom028 Deducing the ions in a binary ionic compound from its empirical formula
atom013 Predicting and naming ionic compounds formed by two elements
atom036 Identifying common polyatomic ions
atom011 Predicting the formula of ionic compounds with common polyatomic ions
atom009 Naming ionic compounds with common polyatomic ions
atom035 Deducing the ions in a polyatomic ionic compound from its empirical formula
atom037 Identifying oxoanions
atom010 Naming ionic compounds with common oxoanions
rxn002 Writing a chemical equation from a description of the reaction
rxn001 Identifying combination, decomposition, single and double displacement reactions
rxn006 Identifying precipitation, combustion and acid-base reactions
stoich012 Stoichiometric coefficients
stoich013 Balancing chemical equations with noninterfering coefficients
stoich014 Balancing chemical equations with interfering coefficients
stoich002 Using the Avogadro Number
stoich003 Calculating and using the molar mass of elements
stoich004 Calculating and using the molar mass of diatomic elements
stoich005 Calculating and using the molar mass of heterodiatomic compounds
stoich015 Solving for a reactant using a chemical equation
stoich017 Limiting reactants
stoich018 Percent yield of chemical reactions
thermo014 Calculating the heat of reaction from molar reaction enthalpy and the mass of a reactant
thermo018 Calculating the heat of reaction from bond energies

gas001 Interconverting pressure and force
gas002 Measuring pressure in non-SI units
gas003 Understanding pressure equilibrium and atmospheric pressure
gas004 Understanding Boyle's Law
gas005 Solving applications of Boyle's Law
gas006 Using Charles's Law
gas007 Using the ideal equation of state
gas008 Interconverting molar mass and density of ideal gases
gas009 Calculating mole fraction in a gas mixture
gas010 Calculating partial pressure in a gas mixture
gas011 Solving for a gaseous reactant
thermo017 Using heat of fusion or vaporization to find the heat needed to melt or boil a substance
thermo019 Relating vapor pressure to vaporization
soln001 Predicting the products of dissolution
soln002 Writing net ionic equations
soln003 Predicting precipitation
stoich019 Calculating mass concentration
stoich026 Using mass concentration to find solute mass and solution volume
stoich027 Solving applied mass concentration problems
stoich020 Calculating molarity using solute moles
stoich028 Using molarity to find solute moles and solution volume
stoich029 Calculating molarity using solute mass
stoich030 Using molarity to find solute mass and solution volume
stoich021 Dilution
stoich022 Calculating mass percent composition
stoich032 Using mass percent composition to find solution volume
stoich037 Solving for a reactant in solution
stoich038 Solving limiting reactant problems in solution
pchem011 Understanding common types of radioactive decay
pchem015 Using the half-life of a radioisotope

acid001 Identifying acids and bases by their reaction with water
acid002 Identifying acids and bases by their chemical formula
acid003 Naming inorganic acids
acid004 Deducing the formulae of inorganic acids from their names
acid005 Naming acid salts
acid006 Recognizing common acids and bases
acid007 Understanding the difference between strong and weak acids
acid008 Identifying Bronsted-Lowry acids and bases
acid009 Finding the conjugate of an acid or base
acid010 Predicting the products of the reaction of a strong acid with water
acid011 Predicting the products of a neutralization reaction
acid016 Interconverting pH and hydronium ion concentration
acid017 Using the ion product of water
acid018 Making qualitative estimates of pH change
acid019 Calculating the pH of a strong acid solution
acid021 Diluting a strong acid solution to a given pH
acid020 Calculating the pH of a strong base solution
acid022 Preparing a strong base solution with a given pH
acid023 Determining the volume of base needed to titrate a given mass of acid
acid024 Determining the molar mass of an acid by titration
acid025 Standardizing a base solution by titration

redox001 Assigning oxidation numbers
redox002 Recognizing reduction and oxidation
redox003 Identifying oxidizing and reducing agents
redox004 Identifying oxidized and reduced reactants in a metal-nonmetal reaction
redox005 Identifying oxidized and reduced reactants in a single-displacement reaction
redox006 Writing a simple half-reaction from its description
redox007 Writing the half-reactions of a metal-nonmetal reaction
redox008 Writing the half-reactions of a single-displacement reaction
redox011 Predicting whether simple electrochemical reactions happen
redox012 Designing a galvanic cell from a single-displacement redox reaction

equi009 Predicting how reaction rate varies with pressure, concentration and temperature
equi010 Interpreting a reaction energy diagram
equi011 Relating activation energy to reaction rate
equi012 Calculating the reaction rate of one reactant from that of another
equi013 Drawing the reaction energy diagram of a catalyzed reaction
equi003 Understanding that no reaction goes to 100% completion
equi004 Predicting relative forward and reverse rates of reaction in a dynamic equilibrium
equi005 Using Le Chatelier's Principle to predict the result of changing concentration or volume
equi006 Using Le Chatelier's Principle to predict the result of changing temperature
equi007 Writing an equilibrium constant expression
equi014 Writing an equilibrium constant expression for a heterogeneous equilibrium
equi008 Using an equilibrium constant to predict the direction of spontaneous reaction

ochem001 Identifying organic compounds
ochem003 Interpreting condensed chemical structures
ochem004 Identifying organic functional groups
ochem008 Naming normal alkanes
ochem009 Using family suffixes to name organic compounds