It is important for the teacher to know that ELL students are often easily overwhelmed, anxious, and shy. Clear and gentle verbal communication is encouraging and welcome ELL children to participate and follow along. Word walls and picture cards are effective classroom practices for ELL students to reference. Here's an easy read on instructing ELL students: http://www.edutopia.org/discussion/9-tips-support-english-language-learners.
Also, here is a great website for ESL students: https://esl.brainpop.com/. It has fun and engaging activities for ESL students. BrainPop also has a site for non-ESL students so this is a great site for all students in the classroom to enjoy computer-use and technology.