This is a Word Detectives Code Poster and weekly lessons. I designed this activity to go along with first grade Journeys Unit 4 spelling words and high frequency words, but it can also be used as an independent activity. Students will use the Word Detectives Poster to break the code on the weekly lesson. I will be using this activity in my word work reading center. Included: Word Detectives Poster, Weekly Lesson for Unit 4, Answer Sheet and suggestions for use. To see an example, download the first lesson for free.