Making nouns plural in Spanish

Make the following noun plural in Spanish:

escuela

Make the following noun plural in Spanish:

profesor

Make the following noun plural in Spanish:

reloj

Make the following noun plural in Spanish:

oficina

Make the following noun plural in Spanish:

ventana

Make the following noun plural in Spanish:

profesora

Make the following noun plural in Spanish:

ratón

Make the following noun plural in Spanish:

lápiz

Make the following noun plural in Spanish:

español

Make the following noun plural in Spanish:

mochila