This is the worksheet that I used for my 4th- 5th grade students.The meanings of the words below are in Turkish so you must translate them into your own language. I hope it will be useful to you :)
The above downloadable teaching material is a great resource for at Elementary (A1) level. It is a useful material for practising Modals in English, and was designed for developing your class' Writing skills. It is about the topic and words of Science.