Can a math vocabulary word wall really help students develop deeper meaning in mathematics? Absolutely, but only if you use it as one of your regular activities for teaching vocabulary.
Without a working knowledge of core math vocabulary, we actually put students at risk for failing. 
These types of words are either Tier 2 or Tier 3 vocabulary and they should be embedded into the curriculum. A lot of Tier 2 ones even have different meanings in mathematics from everyday situations, which makes it especially difficult for our ESOL students.
Any academic content word can be displayed as concept maps, root words, and related words. English language learners and low SES students must have a contextual input on the word wall.
Also, students own representations (either by drawing or diagrams) of math vocabulary words should be included.
Some other key features of a working Math Vocabulary Word Wall are:
A word wall also helps to bring the concept to children's conscious level. The words are available for immediate recall so they can reflect and share their discoveries and strategies with each other.
(Mason, J. (1992). Doing and construing mathematics in screen space, In Perry, B., Southwell, B., & Owens, K. (Eds.). Proceedings of the Thirteenth Annual Conference of the Mathematics Education Research Group of Australasia . Nepean, Sydney: MERGA).
Students can hear and analyze each other's approaches and discoveries. This shifts the teacher from being the questioner to the students becoming owners of their own discoveries. The lessons can be whole class, small group or done in pairs. Click on the ebook to find out more! 
Our kids have to internalize difficult and more obscure math terms. We have to help them make connections to prior knowledge and provide opportunities to stretch their thinking with new words.
Along with these activities, consider asking your ELL students to write each word in their native language and place it on the word wall beside the English word. The research shows that cognitive development proceeds quicker when instruction for these type of kids is in their native language (makes sense, yes?).
Try these easy vocabulary activities:
1. Give a clue, then ask students to find the word to go with your clue.
2. Play word wall bingo (3x3 grid – students write 9 words and teacher calls out the meanings).
3. Select two words and ask students to justify how they go together.
4.
Ask students to sort and label groups of words from the wall. By not
giving them the way to sort them, you are allowing the students to do a
blind sort and create their own meaning.
5. Write poems about word wall words.
6. Say a sentence, but leave out a word from the Word Wall. Students use context clues to guess the missing word.
7. Scramble the letters in a word. Ask students to unscramble and figure out the word.
8. Play “Guess the Covered Word” with math vocabulary words.
9. Have students define and illustrate a word to show their understanding.
10.
Give each student a word and tape it on their back. Students must
travel the room asking Yes or No questions to find out what word they
are.
11. Select a word, then ask students to create word
chains, adding a word that connects in meaning to the first word, and
then one that connects to that word, etc. Ask students to explain their
connections.
12. Give a Word Bank of three to four Word
Wall words. Ask students to define or describe a vocabulary word using
the word bank. Great for teaching English vocabulary! (i.e. polygon,
sides, angles; chord, diameter, radius, center; faces, edges, vertices).
