These Powerpoint slides were created to teach, practice and assess the mastery of facts to sums of 18. Many students have great difficulty learning their addition and subtraction math facts, and this "Singapore Math" based approach is a GREAT way to overcome that obstacle. In my dual language classroom, even my struggling ELL students were able to attain automaticity of their facts with this approach. All facts are taught in order beginning with make 5 and ending with counting on. Since math is