Is your child using the textbook by V.N. Rudnitskaya ? This program (often part of the "Nachalnaya Shkola XXI Veka" system) is known for being thorough, but it can be a jump for students transitioning from 1st grade. What to expect this year:
The textbook emphasizes oral counting. Try practicing 5-10 minutes of quick addition/subtraction in the car or during dinner. uchebnik 2 klass matematika rudnitskaia
Rudnitskaya focuses heavily on word problems that require kids to think why they are doing a calculation, not just how . Is your child using the textbook by V
If your child is struggling with the new division concepts, use LEGO bricks or buttons to "share" items into groups. uchebnik 2 klass matematika rudnitskaia