Here's a short tidbit on accepting Google Classroom summaries and what you can expect to see in Google Classroom if you use the summaries vs. student log in.
Question: "I get the emails but I'm still not seeing what my students are submitting"
Answer: Summaries are...
Answer: Summaries are...just that, a summary. This is an easy way to quickly check up on what your student may be missing and upcoming assignments. It is not to receive detail.
For DETAIL on class work and assignments: