Questioning
Question everything. Ask children questions about anything and have them answer it. Make it simple enough where they can understand them but challenging enough where they have to think about it. Asking them questions will help them comprehend things that are going on around them.
Repeat X 100
Have them repeat words 100 times. When they repeat the words, make sure they are pronouncing them correctly. I would use simple words or vocabulary words or using the names of objects so they can learn the name associated with the object.