Rational and irrational numbers
Students sort numbers into ones that can be written as fractions and ones that cannot, like the square root of two. They work with very large and very small numbers using powers of ten.
This is the year math shifts from arithmetic into algebra. Students work with rational and irrational numbers, then move into writing and solving linear equations that describe real situations. They study lines and slope, analyze data on scatter plots, and reason about shapes using the Pythagorean theorem. By spring, students can solve an equation like 3x + 7 = 22 and explain what the slope of a line means.
Students sort numbers into ones that can be written as fractions and ones that cannot, like the square root of two. They work with very large and very small numbers using powers of ten.
Students solve equations with a variable on both sides and graph straight lines on a coordinate grid. They learn that a line's steepness, called slope, tells a steady rate of change.
Students find the point where two lines cross and what that point means in a real situation, like when two phone plans cost the same. They also describe relationships as functions with one output for each input.
Students slide, flip, turn, and resize shapes on a grid and notice what stays the same. They use the Pythagorean theorem to find the missing side of a right triangle and the distance between two points.
Students plot pairs of measurements on a scatter plot and draw a line that fits the trend, like height and shoe size. They also find the volume of cylinders, cones, and spheres.
Grade 8 number work pulls everything together. Students add, subtract, multiply, and divide with whole numbers, fractions, decimals, and negative numbers to solve the kinds of problems they'll see in high school math.
Students write and solve equations and inequalities that describe real situations, like figuring out how many hours of work it takes to earn a target amount. The focus is on setting up the math correctly, not just calculating an answer.
Students sort and measure flat and solid shapes, comparing angles, sides, and faces to explain what makes each shape different from the others.
Students collect data and display it in tables or graphs, then use measures like mean or median to summarize what the numbers show.
Students figure out how likely something is to happen and look for patterns in data sets. This standard covers reading graphs, comparing outcomes, and drawing simple conclusions from real information.
| Standard | Definition | Code |
|---|---|---|
| Numbers and Operations | Grade 8 number work pulls everything together. Students add, subtract, multiply, and divide with whole numbers, fractions, decimals, and negative numbers to solve the kinds of problems they'll see in high school math. | PA-MATH.K8.8.1 |
| Algebraic Concepts | Students write and solve equations and inequalities that describe real situations, like figuring out how many hours of work it takes to earn a target amount. The focus is on setting up the math correctly, not just calculating an answer. | PA-MATH.K8.8.2 |
| Geometry | Students sort and measure flat and solid shapes, comparing angles, sides, and faces to explain what makes each shape different from the others. | PA-MATH.K8.8.3 |
| Measurement and Data | Students collect data and display it in tables or graphs, then use measures like mean or median to summarize what the numbers show. | PA-MATH.K8.8.4 |
| Probability and Statistics | Students figure out how likely something is to happen and look for patterns in data sets. This standard covers reading graphs, comparing outcomes, and drawing simple conclusions from real information. | PA-MATH.K8.8.5 |
PSSA Mathematics is the spring summative math test for grades 3 through 8, aligned to PA Core Math.
End-of-course exam in Algebra I, typically grade 8 or 9. Required for graduation under Act 158 pathways.
Federally administered sample-based assessment in reading, mathematics, science, and writing. NAEP results inform state-by-state comparisons rather than individual student or school accountability.
By spring, students should be comfortable working with rational numbers, solving multi-step equations, and using a coordinate grid to graph lines. They should also be able to read a data set, find a typical value, and describe shapes in two and three dimensions using their measurements.
Ask students to explain the steps out loud before checking the answer. If they get stuck, have them draw a picture, write the problem in their own words, or try a simpler version first. Ten minutes of talking through one problem usually beats finishing a whole worksheet in silence.
Students should solve equations with variables on both sides, fractions, and parentheses without panicking. They should also write an equation from a word problem and check whether the answer makes sense in the situation, not just whether the arithmetic checks out.
Most students who say this got lost somewhere earlier and never caught up. Look at fractions, negative numbers, and basic equations first. Short, calm practice on those weak spots, a few problems a night, tends to rebuild confidence faster than working on the current unit.
A common order is rational numbers and exponents, then expressions and equations, then proportional reasoning and linear graphs, then geometry with angles and the Pythagorean theorem, and finally data and scatter plots. Equations and graphs take the most time and benefit from being revisited later in the year.
Negative numbers, solving equations with fractions, and interpreting the slope and intercept of a line are the usual sticking points. Many students can compute but struggle to explain what a slope means in a real situation, so plan extra time for word problems and graphs side by side.
At this level, the focus is on reasoning and setting up problems, so a calculator is fine for the arithmetic. Students should still know their multiplication facts and be able to estimate, since shaky number sense slows them down on every problem and makes wrong answers harder to catch.
A ready student can solve a linear equation, graph a line from an equation, work with positive and negative numbers without hesitation, and explain what an answer means in context. If those four things are solid, algebra next year will feel like an extension, not a fresh start.