I'm giving you this advice as someone who gets 3 primary girls ready for school,
Get everything ready the night before.
We come home from school, they empty their lunch boxes, put any school letter they want signed next to the microwave and then putbtheir shoes, coat and bag away and get changed into their pj's (love the cold weather pj excuse)
After homework and then dinner I check the uniform they have taken off and if I can get another day out of any item I take that and then get what else is needed from their wardrobe.
Lay the whole uniform on the dining room table, coat first then scarf, gloves hat, the jumper, shirt, skirt, tights, knickers and shoes on the floor under the table next to their book bag.
Find the brush and bobble box and put that on the table along with baby wipes for last minute snot duty.
Do the same for your own outfit, you don't have to lay it out next to your clean knickers and bra, just know exactly what you are wearing and note where your shoes and coat are of you don't keep them in one place.
Make lunchboxes up and store In The fridge.
Get cereal bowls, cup for your tea with tea bag and sugar in on the side in the kitchen.
Get up 15 minutes before DC and have a cup of tea, sign school letters and sort any money needed to go into school and then start to get ready, get DC up and give them breakfast NO TV - NO TV! IPAD! PHONE UNLESS COMPLETLY READY.
Ahem, that one is Realy important.
Breakfast, wash, dress, hair.
Coats and shoes and snotty nose check.
Set a time limit for each step, 5 minutes to have a wash and then bring your clothes up and we can get dressed togeather etc.
Leave for school.
Repeat 5 days a week for 39 weeks of the year.