They were at the school together. Arrived ~8am, did the rounds, saw some people, and then last seen ~8:45-9am but not on record as seen together leaving. For her vita/resume, you can see her public self-posted info on the Professional socmedia site that she and millions of others use. In regards to this school, she is a regular volunteer/helper (well, that is, up until the Science Fair day).
Precisely.
My sentiments exactly - said it before, parking far away would make it very easy to go unnoticed upon departure. Meet me at the car... then once together again, inquiring about the trip to the car.... Did you see any of your classmates or teachers to say bye?? No, mom.
We do not know and can only privately speculate on this. I did find it interesting that major news outline (HLN today) used language such as "sent away" in regards to this question (perhaps why it is fresh on your mind) when I know I haven't seen any details on the why - even with all the socmedia family public postings out there.
WWeek is our weekly paper here in Portland. It's been around for 35 years and has received investigative reporting accolades. I believe in the integrity of their story and have ever since it was reported. To your question, here is how they put the ping part:
"WW has learned that federal, county and city law-enforcement officials say the reason for the search of Sauvie Island is that cell-phone records reveal Kyron’s step-mother, Terri Moulton Horman, may have been on the island the day he disappeared.
This information comes from five separate law-enforcement officials from agencies at the city, county and federal level. To our knowledge, none is directly involved with the investigation." End WWeek quotes.