"Important element is deeply understanding our curriculum. Most teachers know what they're going to cover this week or this term. Few of us can specify precisely what students should know, understand, and be able to do as a result of any particular learning experience or set of learning experiences. Without that specificity, alignment between content, assessment, and instruction is weak."

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Most of the Pyramids were observatories in perfect alignment. Some Pyramids were aligned so that the sun would hit them at a certain time of the year. And yet, it could rain all year, and not a drop of rain could get inside. No one covered the hole. So that took some high intelligence to line a thing up so that the exact time of year when the sun was in the exact position, it would light up the inside of that crypt.

— John Henrik Clarke