Students draw teeth and then color some in to make them look "lost." Then they write a subtraction sentence to match their picture.
Easy to differentiate, and who doesn't love missing teeth?!
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.