The first thing I check these days is whether the customer has an "RF Profile" configured. It solves about 90% of the issues immediately by creating one. https://documentation.meraki.com/Wireless/Operate_and_Maintain/User_Guides/Radio_Settings/RF_Profiles I mostly use the "Open Office Profile", but in your case the "Classromm Profile" might be best. Make sure you make the profile the "default", or apply it to all your APs. And while you are there, make sure you turn on AI channel planning and "busy hour". https://documentation.meraki.com/Wireless/Operate_and_Maintain/User_Guides/Radio_Settings/AI_-_RRM
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