Since your search is for for 3rd-grade Russian, a great "feature" would be a Quick-Check Answer Key designed specifically for busy parents or teachers.
: Next to the answer, include a tiny "reminder" box of the grammar rule being tested (e.g., "Suffix -ek/-ik rule: if the vowel drops, write -ek"). gdz po russkomu za 3 klass segodnia stranitsa golub.v.t
You can find complete answer keys for this specific workbook on popular homework help sites like GDZ.ru or through curriculum resources on YaKlass . from Golub's workbook Since your search is for for 3rd-grade Russian,
: Highlight words where 3rd graders often make mistakes on that specific page. from Golub's workbook : Highlight words where 3rd
: Since you mentioned "today," the feature could auto-sync with the typical Russian school curriculum schedule to show you the page most likely assigned right now.
Instead of just a list of answers, this feature would include: