Start by acknowledging that the Vilenkin textbook is the gold standard for Russian schools, but its logic-heavy problems can be tricky.
: The transition from whole numbers to parts.
: Introducing letters to represent unknown numbers.
: Check if the site offers more than one way to solve the same problem (e.g., using a table vs. an equation). Math Help for Fifth Graders - Prodigy Math
: Sites like Mathleaks prioritize the process over the final number.