If you are an inquiry / constructivist teacher then you most likely understand; there are some things that just can't be a target. For example, there are many ways for children to multiply: repeated addition, equal groups, base-ten blocks, skip counting, arrays, or use charts. If you were to post an objective, you'd have to spend days teaching students the various strategies, choose one of those strategies and require that all children use them regardless of what works best for them, OR set up different stations for children to solve the same problem over and over again.
Ideally, objectives should be posted stating the what, and allowing the how to ve determined by the learner. However, we all know that with PLCs and data teams that is being eliminated. Why? Because for some reason, we've got teachers and leaders bamboozled into believing that if every teacher is teaching the same thing on the same day with the same materials, and teaching the same strategies to very different students then