Addition flashcards and timed tests are divided into three levels: 0-10, 11-14, and 15-18.
Each timed test has twenty problems. There are two versions of each test. Example: Addition 15-18 Test 1; Addition 15-18 Test 2.
The subtraction flashcards and timed tests are organized in the same manner as addition.
Differentiated instruction - Give students one minute to complete the 20 problem timed test. When facts are mastered with 95% accuracy, students move to the next level. For higher performing students, see my multiplication and division flashcards and timed tests.