ACT Math
Lesson Plan
Matrix operations (add, subtract, scalar multiply, multiply)
Goals / Objectives
Add, subtract, scalar-multiply and multiply matrices, first deciding from their dimensions whether the operation is defined
State a matrix's dimensions as rows x columns and identify the entry at a given row and column
Add and subtract matrices of the same dimensions and multiply a matrix by a scalar, stating that a sum or difference of differently sized matrices is undefined
Determine from dimensions alone whether AB is defined, and state the product's dimensions
Compute AB by the row-by-column rule for 2x2 by 2x2 and 2x2 by 2x1
Show with a specific pair that AB ≠ BA, and state the identity matrix's effect under multiplication
Standards
"N 406. Add two matrices that have whole number entries" "N 505. Add and subtract matrices that have integer entries" "N 607. Use relations involving addition, subtraction, and scalar multiplication of vectors and of matrices" "N 705. Multiply matrices" "N 706. Apply properties of matrices and properties of matrices as a number system" "Note: A matrix as a representation of data is treated here as a basic table."
Academic Vocabulary
Not in our source material
Materials
No slides or practice set for this standard yet
Remediation
Enrichment
This lesson’s brief has no Differentiation
Accommodations
Not in our source material
Anticipatory Set / Bell Work
This lesson’s brief has no Suggested Activities
Modeling
Check for Understanding
This lesson’s brief has no Formative Assessment or Assessment Ideas
Guided Practice
No slides or practice set for this standard yet
Independent Practice
No slides or practice set for this standard yet
Homework
Pacing
This lesson’s brief has no Pacing