Timers are my best friends! By law, students in tier 2 of the RTI process have to have 15 minutes of intervention 3 days a week. Students in tier 3 require 30 minutes of intervention 4 days a week. These days do not include your progress monitoring day. You can hold two tier 2 groups within the 30 minute block. While the first group is receiving the selected intervention from you, have the other group on the computer independently working on the same skill. when the timer goes off, have students switch. The rest of the students in the class are also completing their tiered work independently and quietly. I even have a group that leaves for enrichment with the TAG instructor.

We have a time similar to this at my school, but I am only tasked with math remediation. The only meaningful way to use this time is to look at test data and gauge where each student is currently performing. Then, you will have to find extra practice for where they are and have them complete it during that time. You can then provide feedback and move them on or hold them at the same skill until you feel they are ready to move on. You may target some specific students who are really struggling and maybe you could have one on one teaching time with those students as necessary.

You could create table group stations where these students would go where they need to be based on their RTI. High ability students could assist students, as you walk from station to station assisting the students in small groups.

Make a timely schedule for yourself, it will help you organized when to do what and what subject with certain students.

I think if you assign groups with a mixture of the higher and lower level students would be beneficial.

You can make circles and centers. Have different students run different groups and switch groups for effective learning.

Wow! What a difficult task. I think that you simply must provide each student with work and practice which is according to their skill level. You can then provide effective feedback as necessary.