In the 21st century, while fluency in facts is important, math means getting students to think deeper about solutions, rather than doing pages of problems.  

Jo Boaler's (math guru at Stanford) math website:   https://www.youcubed.org/

Eureka math:  

Curriculum with homework pages

  https://greatminds.org/math/parents

                        http://eurekamathhelp.piqua.org/

                        http://eurekamathhelp.piqua.org/student-math-resources/second-grade-resources

https://www.youtube.com/results?search_query=duane+habecker+grade+2

                        https://www.engageny.org/content/all-second-grade-math-videos