Once you have your SPF record set up, you can check it using one of these sites:
https://mxtoolbox.com/spf.aspx - has basic testing for the SPF record.
https://www.kitterman.com/spf/validate.html - allows more diagnostics for the SPF record.

See also
SPF Record    DAT   
PCR Educator K-12 School Information System is an online database engineered for independent and private schools to deliver the highest level of flexibility, unique experience, transparent communication and customized design. Being a complete cloud-based solution, PCR Educator system guarantees convenient access anytime, anywhere.