Light through a pinhole

Calculate where a ray of light coming through a pinhole hits an image plane.

Recognize fractions 2

Identify the fraction of a whole that is shaded.

Measuring kidney function

Renal system  Passage 2

Sums of consecutive integers

Practice finding the nth number in a sequence of consecutive numbers based on the sum.

Intensifiers and adverbs of degree

Identify and use adverbs of degree. Many of them don't end in "ly"!

Solubility equilibria questions

Solubility equilibria questions

Percent word problems

Practice solving word problems involving percents.

Complex and compoundcomplex sentences

Complex sentences are simple sentences with dependent or subordinate clauses added to them. Compoundcomplex sentences are compound sentences with dependent or subordinate clauses added to them.

Permutations & combinations

Permutations and Combinations with overcounting

Pronoun vagueness

Help clarify the sentence by keeping or changing existing pronouns.

Systems of linear equations word problems: Level 2


Basic division

Divide two numbers. Quotients are equal to or less than 10.

Analyzing categorical data

For example, complete a conditional distribution given a twoway table.

Probabilities of compound events

Practice using sample space diagrams to find probabilities.

Motion along a curve (differential calc)

Solve problems that involve motion along a curve defined by a twovariable equation.

Classify numbers: rational & irrational

Practice identifying whether numbers are rational or irrational.

Arithmetic series in sigma notation

Practice writing finite arithmetic series like 6 + 10 + 14 in sigma notation.

Twostep equations

Practice solving equations that take two steps to solve. For example, solve 16 = x/4 + 2.

Multiplication and division word problems

Practice solving multiplication and division word problems. Some problems have remainders.

Compare shapes

Practice comparing shapes based on their number of sides, number of corners, and sidelengths.
