The LearningA-Z website if offering a Free 7-day trial of materials on their website.
They offer reading, writing, science, vocabulary, spelling, online reading practice and more for PreK thru 6th grade.
I have used their material as extra practice during homework lessons, and also as tests and quizzes. I’ve also used the vocabulary and spelling as part of daily classroom lessons. It made my job a lot easier.
Get started with your 7-Day Free Trial.
And by the way, try their (very generous) free samples.