Today, our lesson on counting, reading, and writing 13, 14, and 15 continued, focusing on the number 15. Libby used base ten cubes to model 15 with one tens stick and 5 ones and colored in pictures of base ten blocks, tens frames, and objects to model 15. Then, she worked on timed subtraction facts, completing 40 minus 1 problems. Finally, Libby traced the numbers 1 through 30.