Teacher answer key for Day 3: Elimination Operation. Includes step-by-step vertical addition walkthrough and identifies the correct variables for elimination in the drill. Corrected page break issues and improved layout.

Teacher answer key for Day 1: Visual Clues. Provides solutions for the graphing problems, classification of solution types, and the rapid drill. Corrected page break issues and improved graph contrast.

Teacher answer key for Day 3: Elimination Operation. Includes step-by-step vertical addition walkthrough and identifies the correct variables for elimination in the drill. Corrected page break issues and improved layout.

Teacher answer key for Day 1: Visual Clues. Provides solutions for the graphing problems, classification of solution types, and the rapid drill. Corrected page break issues and graph contrast.

Teacher answer key for Day 4: Mystery Solved. Provides the system setup and step-by-step solution for the word problem, plus the method selection answers for the final drill.