ESOL students benefit from easy access to words. A movable or portable word wall is one way to increase students exposure to sight words.
In my classroom I have a magnetic word wall. Sometimes, when students ask for help finding words I will take down two or three words and have them identify the word they are looking for. Then they have the word at eye level to copy. I have a magnetic chalkboard. I used sports tape to separate the letters.
When I travel to other classrooms, or work with students that need fewer words to choose from I use a portable word wall. This is made from three file folders glued together. Each word it attached with velcro.
To help students with writing, I have vocabulary folders. They are made with sheet protectors in folders with brads. These pages are available in my TPT store.