Mathematics
Adding and Subtracting Fractions: Find the Common Denominator
Students add and subtract fractions and mixed numbers with unlike denominators and find the mistakes in sample student work.
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Mathematics
Angle Pairs: Complementary, Supplementary, Vertical
Students learn the four basic angle-pair relationships, then write and solve equations to find missing angle measures and catch mistakes in sample work.
Mathematics
Angle Relationships: Find the Missing Measure
Students use complementary, supplementary, vertical, triangle and parallel-line angle facts to find missing angles and correct sample work.
Mathematics
Area and Perimeter of Rectangles, Triangles and Combined Shapes
Students match shapes to area formulas, then find area and perimeter of rectangles, triangles, trapezoids, rhombuses and combined shapes described in words.
Mathematics
Area and Perimeter: Fences, Floors and Fixing Mistakes
Students find area and perimeter of rectangles, triangles, parallelograms and an L-shaped room, then correct sample mistakes.
Mathematics
Arithmetic Sequences and Linear Growth
Students find common differences, extend arithmetic sequences, use aₙ = a₁ + (n − 1)d, and model plant growth and savings with linear equations.
Mathematics
Box Plots and Histograms from Data
Students find a five-number summary and outliers from raw data, build a histogram from a frequency table, and read box-plot statistics.
Mathematics
Circles: Circumference, Area, Arc Length and Sectors
Students compute circumference, area, arc length and sector area from radius, diameter and central angle, and solve real-world circle problems.
Mathematics
Completing the Square: Perfect Squares and Vertex Form
Students find the missing term of perfect-square trinomials, solve three equations by completing the square, and rewrite a parabola in vertex form.
Mathematics
Complex Numbers: The Cycle of i and Complex Arithmetic
Students discover the repeating pattern of powers of i, then add, subtract, multiply and divide complex numbers.
Mathematics
Coordinate Geometry: Distance, Midpoint and Slope
Students use the distance, midpoint and slope formulas to find lengths and centers, test whether a triangle is isosceles, and check a rectangle’s diagonals.
Mathematics
Decimal Operations: The Class Store Price List
Students use a price list to add, subtract, multiply and divide decimals in shopping problems and correct sample mistakes.