Number Detectives Lesson Plan
A comprehensive 3-day lesson plan for teaching 1st-grade students mental math strategies for finding 10 more or 10 less, including differentiated group activities and spiral reviews.
Equation Balance Spiral Review
Daily 5-minute spiral review worksheets for Days 1-3, focusing on determining if addition and subtraction equations are true or false (OA.7).
10 More Slide Deck
Visual presentation for Day 1 instruction focusing on the "10 more" mental math strategy using a hundreds chart and place value patterns.
10 More Instructional Script
Teacher instructional script for Day 1, providing verbatim dialogue and instructional cues to accompany the 10 More Slide Deck.
10 More Mania Worksheet
Student worksheet for Day 1 focusing on finding 10 more than a number, including a special challenge problem for mental math fluency.
10 More Answer Key
Answer key for the 10 More Mania Worksheet, providing correct answers and brief explanations of the mental math thought process.