Alister Doyle, I work at Noodle.
Have you seen this Curriculm and Instruction page on the Keller ISD website? You can browse the curriculum for a specific subject and grade level and it's actually pretty comprehensive. So for example, this overview of 3rd Grade Math gives a detailed breakdown of the time spent on each topic, and how it fits in with the broader curriculum. I don't know if that same information exists for Montgomery County but might be a good starting point in any comparison between the two?