This two-book set with included Hot Dots® pen provides children with 100 lessons on a variety of reading and language arts skills, from reading comprehension and vocabulary to spelling and punctuation. Fifteen of the 100 lessons are challenge activities that prepare children for skills at the next grade level. 85 Second-grade-level lessons in these areas: Reading Comprehension, Synonyms & Antonyms, Homophones & Multiple-meaning Words, Context Clues, Spelling, and Punctuation & Grammar, PLUS 15 challenge reading lessons for advanced learners. The set includes two sturdy spiral-bound books and Hot Dots® electronic pen. Hot Dots® pen requires 2 AAA batteries (not included).