IXL.com, AdaptedMind.com and SoftSchools.com all offer resources to study second-grade math online. Available study items include online step-by-step lessons, games and worksheets in various second-grade math concepts.
IXL.com provides a comprehensive listing of second-grade math concepts with links to an online lesson for each concept. Users complete a series of questions and then receive a score after the questions are completed. AdaptedMind.com offers more than 200 interactive lessons that start at a basic level and then move up as the user demonstrates mastery. SoftSchools.com provides math games, many of which are customizable, as well as online worksheets for studying second-grade math concepts.