This document contains two hidden message puzzles - one on the 1-100 number board and one on the 1-150 board - and for each puzzles I have included both a basic and an advanced version. I hope this will make it easy for you to find the right activity for each student.
The basic puzzles are simple number searches and are meant to be used to practice number recognition and place value, with a little bit of spatial reasoning thrown in too.
The more advanced puzzles require adding and subtracting numbers to get to the solution. These are designed to help the students notice patterns and develop mental math skills.