Do you need to consolidate to be verb in present with a short worksheet? Here's a short worksheet on to be verb present forms in the theme of school days. It's a fill in the blanks worksheet which solely focuses on positive forms of to be. Most of the blanks question the conjugation of to be with personal pronouns.
You might want to check or introduce these three school idioms before giving the worksheets.
pass with flying colours: to pass with a high score or great success
bookworm: used for a person who reads a lot
teacher's pet: a student who receives speacial treatment from the teacher as his favourite student
There's also an online version of this material. You can check out the questions here.