Follow on to my first post: Yesterday, I called Texas Tech University ISD (TTUISD) and Lady Luck was with me. The woman who answered my call is the Principal of the Elementary and Middle Schools. If we can do it, financially, we will enroll our daughter in the 6th grade there, starting in August or September (She will finish 5th grade in a Private school here, in June).
Before I called TTUISD I had looked at the prices of the books for the 6th grade school year and almost had a Heart Attack.

Several of those books were Used. Almost the price of Tuition and Fees, for one Semester, when you add Shipping.
The Principal told me they are working on getting the Middle School classes online (the High School classes are already available online), but she does not know if that work will be finished by August or September. If so, that will be a blessing for us.
She also told me that she can "Multi Grade" our daughter. For example, I suspect DD is advanced, in Math and Science, because the Colombian government is very demanding, with the subjects required in Elementary and Secondary schools and they take more subjects here, than in the USA.
Very glad to be here in this Forum and I have already learned so much here, in just a few days.