Today's lesson was on counting, reading, and writing 13, 14, and 15 with a focus on 13. Libby used base ten cubes to model 13 with one tens stick and 3 ones and colored in pictures of base ten blocks, tens frames, and objects to model 13. Then, she counted groups of 13, 14, or 15 objects and wrote the amounts. Finally, Libby solved subtraction problems on taking away 1 within 10.