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I don't know the ages of your children, but you could have a homework time at a set time every day, followed by some kind of treat (desert, ice cream if it is after dinner). Have all TV's and radios, etc. off, have them all at the same table, speak quietly to establish a feeling of silent concentration, and be available to assist them.
When all three are finished, then compliment them and give them their treat.
All three must be done with their work before they get their reward. In that way they will feel that this is a group effort and that they must encourage each other.
Enforce sleeping times and make sure they have the silence to sleep. Don't let them eat before going to sleep, and certainly don't let them have caffeine or diet drinks (stimulant).
Make sure that they lay out their clothes at night and have everything ready to go. This way they will develop good habits for waking up and being ready. The more they do this, the more proficient they will get.
You can keep a chart for all three children and give stars for completing homework, waking up, going to sleep, and being ready on time.
The one with the most stars will get a special treat.
You can figure out your own routines to suit their needs. Following an organizational pattern as I have suggested will make a large difference in their lives.
I wish you great success and shall keep you family in my prayers.
Elliott, MAE, LPCC, NCC, CCMHC
Thank you so much for detail explanation.
Does others get discourage if I treat to the one who gets more stars?
My kids age is: Girl - 9, Girl -8 and Boy 6.
How to handle when they are rude?
How to solve the issue when they stuck on one thing (toy,book etc)?
Appreciate your help.