Secret Ten Slides
A detective-themed presentation for teaching place value in 1st grade, featuring the Khan Academy number grid video and step-by-step instructions for breaking down two-digit numbers into tens and ones.
Decomposition Detectives Worksheet
A student worksheet for the Decomposition Detectives activity where 1st graders break down two-digit numbers into addition equations and base-10 drawings.
Clue Solver Cards Handout
Discussion prompt cards for teacher-led exploration of place value patterns during the 'Secret Ten' lesson, including specific video pause-points.
Detective Log Journal Journal
A student reflection journal page for the end of the Secret Ten lesson, prompting 1st graders to explain the meaning of the tens digit in the number 35.
Master Detective Guide Teacher Guide
A comprehensive teacher guide for the Secret Ten lesson, including pacing, discussion prompts, and differentiation strategies for 1st-grade place value instruction.