Direct teach vocabulary by using a sentence that provides contextual framework for the word's meaning.
It's important that we teach even the non-math words so that students understand the context of the problem. Building background knowledge is essential.
Elementary Teachers seem to get training on using Word Walls but high school math teachers rarely get such training. This document has details and activities for using Word Walls in YOUR classroom!
If you don't already have a MATH WORD WALL ... start here ... find the words that you want students to know ... create a word wall. Use these resources to inspire your own cards or just copy! BONUS This site also has word cards - https://goo.gl/Cf7onc
Do you have a few words that students must know but just can't seem to remember? Use a music playlist as a mnemonic device. Check out this activity.
This is a video of a lesson ... watch the last 5 minutes to hear discussion of vocabulary graphic organizers to teach words in statistics.
Great blog post on using the game Taboo with Algebra vocabulary. Materials provided. BONUS: Geometry Taboo Cards: https://goo.gl/dqJq9E BONUS: UK version of Taboo Cards: https://goo.gl/GpCQwD BONUS: Calculus Taboo Cards: https://goo.gl/qJAVzr
If you teach a course like Geometry which is vocabulary intense, consider using poetry to improve comprehension!