Based on the information provided, the good study practices that Jamaal is using are:
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He has a good idea of how much time his assignment will take. - He estimates how many days it will take to complete the project.
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He schedules an achievable number of hours per study session. - He plans to study for six uninterrupted hours per day.
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He is using a schedule aid. - He creates a schedule using a daily planner.
The other options do not appear to be applicable based on the information given:
- He has added breaks into his schedule. - There is no mention of breaks in his studying.
- He is studying at a good time of day. - The information states that he is planning to study late each night, which may not be the optimal time for everyone.
So, the correct options are the first three.