This is created as a Spanish practice, however it can be used as an assessment. The irregular verbs that it covers includes stem-changing present participles (vestir(se), repetir, servir, dormir, etc) and I-Y spelling changes (leer, creer, etc.). The first section includes fill in the blank sentences with a word bank of 11 verbs. The second part is translation sentences applying the use of stem-changing present progressive. There are 14 questions total with an answer key. It is Word format so that you can adjust it to meet your needs.
I specifically use it as a homework reinforcement activity for our Realidades 2 Chapter 3B textbook.