There are materials specifically concerned with a particular grammar structure at this beginner level of English, useful for when it is being introduced for the first time. The main structure at this level is the Present Simple and you will find resources for this as well as others such as frequency adverbs.
There are resources at a beginner level that will give students practice in reading and writing. The reading materials are reading comprehensions but can be easily adapted for other reading practice. At this low level, the writing materials are generally guided writings.
Cambridge English: Young Learners, also known as Young Learners English Tests, is a suite of English language examinations specially designed for children in primary and lower-secondary school. The tests are provided by Cambridge English Language Assessment.