Looking for wifi/ble combo shield

Hi,

I'm very new to Arduino. I will teach a course on IoT and is considering using Arduino for device side development.

The device needs BLE and Wi-Fi features. I wonder if there is a combo part for this purpose.

Also, I notice some modules are offered as shield (with plug-in connectors) and some are barebone mini-boards. Just curious what people are doing with those barebone mini-boards (which seem significantly cheaper), i.e., how they are connected to Arduino boards.

Thanks in advance!