head bands and cute updos will be your friends at first! I workout regularly and I wear the naughty hair bands, the ones with grippy stuff. I know it damages my hair but I hate how my hair slips out otherwise.

I work in education as well. Fortunately, the atmosphere is pretty casual and I'm not the only teacher that goes to school with crunchy hair! I always bring a normal hair band for the days when the hair isn't working. My default is a messy bun.
Coarse texture, normal-high porosity, normal elasticity (Komaza Care), very weak waves
cleanser: Redken Fresh Curls Shampoo, CJ Daily Fix

rinse out: GVP Conditioning Balm, CJ Repair Me, CJ Smoothing

jellies/creams: CR Curl Maker, KCCC, UFD Curly Magic
gels: CJ CQ, BRHG