I use math journals in my Math Workshop. I like the idea of using Math Journal Sentence starters with my students. This would serve as a great way to incorporate writing in math and allow students to expand their thinking.
10 classroom routines that get kids talking (and writing) about math strategies
Most kids find it challenging to explain how they solve math problems and to put what they know about math into words. These ten simple classroom routines can help make math talk a regular part of your day!