Great tutorial, highly recommended, manageable exercise units provide rapid feedback and increase the motivation of the children, my daughter loves it and can hardly separate them, the only drawback is that some different terminology, such verbs are called verbs in the program, name words as nouns, adjectives as adjectives is, of course, absolutely correct, however, in the 2nd grade just regionally different terms are used. But this is solvable, since you have the child explain the differences, then there is no problem and the children learn even at an early stage the technical terms. Through different levels of difficulty can be learned Building.