Jonathan worked on subtracting one-digit numbers from teen numbers using the "make a 10" strategy. He demonstrated familiarity with counting on and making a ten to add, number partners for 10, and how to add and subtract in word problems. Furthermore, he now recognizes that teen numbers can be decomposed and composed to subtract, and that addition is a way to check subtraction, and vice versa. Jonathan was able to solve the problems individually. While encouraged to show his work, Jonathan was also advised that he is free to use whatever way helps with the problems.