This is the 4357th most frequent Swedish word.
tacksamma
"Tacksamma" means "grateful" or "thankful" in English.
The word 'tacksamma' in this sentence signifies a feeling of gratitude—used as a plural adjective matching the subject 'Vi' (we).
Vi är tacksamma för er hjälp.
We are thankful for your help.
Here, 'tacksamma' illustrates an emotional response of gratitude—used as a plural form associating with the subject 'De' (they).
De kände sig tacksamma för den vänliga gesten.
They felt thankful for the kind gesture.
In this context, 'tacksamma' conveys the teachers' appreciation—acting as a descriptive adjective for 'Lärarna' (the teachers).