bildend
educational
Expanding a person's mind, culture, and knowledge; instructive and educationally valuable.
Der Besuch im historischen Museum war eine sehr bildende Erfahrung.
The visit to the history museum was a very educational experience.

educational / fine
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educational
Expanding a person's mind, culture, and knowledge; instructive and educationally valuable.
Der Besuch im historischen Museum war eine sehr bildende Erfahrung.
The visit to the history museum was a very educational experience.

'Bildend' is the present participle of the verb 'bilden' (to form / educate). It describes something that actively 'bildet' (forms or educates) the mind or character.
Ein Auslandsjahr kann eine sehr bildende Zeit sein.
A year abroad can be a very educational time.
The meaning 'creating visual works' occurs almost exclusively in the fixed expression 'bildende Kunst' (fine arts). This includes art forms such as painting, sculpture, and graphic art.
Er interessiert sich sehr für bildende Kunst des 20. Jahrhunderts.
He is very interested in 20th-century fine art.
In the meaning 'lehrreich' (instructive), 'bildend' (educational) often describes abstract nouns. Typical combinations are 'eine bildende Erfahrung' (an educational experience), 'eine bildende Reise' (an educational journey), or 'ein bildendes Gespräch' (an educational conversation).
Die Diskussion mit dem Experten war für alle sehr bildend.
The discussion with the expert was very educational for everyone.
pedagogical / educational
'pädagogisch' and 'bildend' can both have to do with learning, knowledge, and education. 'pädagogisch' fits especially when the topic is upbringing, teaching, or dealing well with learners. It often describes a method, a goal, or a teacher's behavior. 'bildend' more often means that something expands knowledge, culture, or thinking. A film, a visit to a museum, or a lecture can be 'bildend'. Learners may confuse the words because both are connected to education. In practical terms: 'pädagogisch' asks about how learning is handled, while 'bildend' asks about the value for knowledge and the mind.

Der Besuch im Museum war für die Gruppe sehr bildend.
The visit to the museum was very educational for the group.
Die Lehrerin reagierte pädagogisch klug, als der Schüler laut wurde.
The teacher responded in an educationally skilled way when the student became loud.