Mit unserem Lernplan lässt sich die Woche leicht planen.

With our study plan the week can be planned easily.

Breakdown of Mit unserem Lernplan lässt sich die Woche leicht planen.

• mit: with
• unser: our
• die Woche: the week
• leicht: easily

Questions & Answers about Mit unserem Lernplan lässt sich die Woche leicht planen.

What does "lässt sich … planen" mean here, literally and functionally?

The structure "lässt sich + infinitive" is often best translated as "can be + past participle" in English.
So "lässt sich … planen" ≈ "can be planned".
It expresses that something is possible and often that it is not difficult to do.
In this sentence, "die Woche lässt sich leicht planen" means "the week can be easily planned" (with the help of the learning plan).

What is the role of "sich" in "lässt sich"? Is it a reflexive pronoun like “himself”?

Here "sich" is a reflexive pronoun, but it doesn’t mean “himself/herself/itself” in the concrete sense.
In this construction, "sich lassen" is more of a grammatical pattern that creates a kind of “reflexive passive” meaning: “can be done”.
So you shouldn’t try to translate "sich" word for word; instead, learn "etwas lässt sich tun" = "something can be done".
Example: "Das Problem lässt sich lösen." = “The problem can be solved.”

What is the grammatical subject of the sentence?