You can find various lesson-specific practice sheets and full textbook translations on community-driven sites: Kanji Practice Workbook PDF Guide - Scribd
A typical Renshuu PDF for a single chapter (e.g., Chapter 4 on time references) includes: minna no nihongo renshuu pdf
Having the file is only the first step. To truly learn, follow these strategies: You can find various lesson-specific practice sheets and
Get a list of the to supplement the textbook? including grammar drills
Minna no Nihongo Renshuu is a supplementary exercise book that accompanies the Minna no Nihongo textbook. The Renshuu book contains a variety of exercises, including grammar drills, vocabulary practice, and listening and reading comprehension exercises. The goal of the Renshuu is to help learners practice and reinforce their understanding of the grammar and vocabulary presented in the textbook.