To the best of my understanding, Clever provides access to read-only data from the SIS. It does NOT provide a mechanism for education vendors to write data back

To the best of my understanding, Clever provides access to read-only data from the SIS. It does NOT provide a mechanism for education vendors to write data back into the SIS (an extremely important aspect of the problem in this ecosystem). While the SIS stores core student data, there is a lot of missing functionality that could be supplemented well by products specializing in a particular niche (eg school lunch tracking, alerting, progress reporting, special education documentation, medicaid reimbursement, etc). However, schools feel unable to use these products since SISes generally disallow information write-back, arguing that accepting data from 3rd party vendors makes the database unstable and violates their end-user license agreement with the district. Clever has helped with the easy problem, but the harder one is no closer to being solved.