Otherwise, they would be placed in the impossible situation of having to remedy problems from the past while trying to keep up with the new concepts and skills presented in subsequent units. (ascd.org)
Each durational unit prehends those units which have gone before, and is prehended by subsequent units. (religion-online.org)
In our study, teachers had no prior experience using a project - based approach, and we had limited time to devote to professional development (about three hours initially, with brief videos introducing subsequent units and an average of 11 visits from coaches), so it was important for the unit and session plans to provide considerable support through explicitness and detail. (edutopia.org)