As complement to the home based lessons, the online component includes thousands of practice problems to challenge students to apply what they are learning, as well as an online grammarian students can contact for additional help. These practice problems are organized into practice sets of varying difficulty. This variation further allows students to have complete control of setting a difficulty level they are comfortable with, as well as being able to introduce, review, and/or build upon a grammar concept without redundancy. Each practice set is instantly scored and returned to the student with answers and explanations.Price: $39.99
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