After moving to online instruction, a few tips that have helped me keep students engaged are; checking every evening and give feedback on grades. Students don't want to wait 24 to 48 hours to see if they understand the material correctly to move on to the next assignment. Make sure to switch some of the assignments up. Listening to lecture every week and answering questions can be monotonous and boring. Give praise. Students will continue to work hard and value you as an instructor if you give them positive feedback.